# Date Picker

> A real date input with a calendar: months slide the way you go, the month name rolls, and the ink mark travels to the day you pick. Full keyboard.

Forms · date, calendar, form, keyboard · HTML, CSS, vanilla JS · no dependencies · updated 2026-10-21
Demo: https://kodza.dev/components/date-picker/

## Files

The code below, served as files: byte for byte what the Kodza site copies (the CSS includes its theme guard).

- [`kodza-date-picker.css`](https://kodza.dev/registry/date-picker/kodza-date-picker.css) · 17.4 KB
- [`kodza-date-picker.js`](https://kodza.dev/registry/date-picker/kodza-date-picker.js) · 15.6 KB
- [`kodza-date-picker.html`](https://kodza.dev/registry/date-picker/kodza-date-picker.html) · 0.2 KB · the markup, to adapt and paste into your page

**Can you run shell commands? Download the CSS and the JS, don't retype them.** Retyping costs thousands of tokens and can drop or change lines of the CSS. Put the files where your stack expects them (Use it says where: change the `-o` paths):

```bash
curl -fsSL --create-dirs -o kodza/kodza-date-picker.css https://kodza.dev/registry/date-picker/kodza-date-picker.css
curl -fsSL --create-dirs -o kodza/kodza-date-picker.js https://kodza.dev/registry/date-picker/kodza-date-picker.js
```

Then load the files from your page as Use it shows, instead of pasting the content. The HTML is the part you adapt (text, links, modifiers): paste it from the Code section. Copy the CSS and the JS from the Code section only if you can't run commands, exactly as they are. (Windows PowerShell: `curl.exe`.)

## API

- Root: `.kodza-date`
- Variables (set them on the root element itself: it declares its own defaults):
  - `--kz-date-bg: #ffffff`
  - `--kz-date-fg: #0a0a0a`
  - `--kz-date-muted: rgba(10, 10, 10, 0.6)`
  - `--kz-date-line: rgba(10, 10, 10, 0.14)`
  - `--kz-date-line-hover: rgba(10, 10, 10, 0.3)`
  - `--kz-date-soft: rgba(10, 10, 10, 0.06)`
  - `--kz-date-ink: #0a0a0a`
  - `--kz-date-on-ink: #ffffff`
  - `--kz-date-shadow: 0 18px 40px -16px rgba(10, 10, 10, 0.3)`
  - `--kz-date-height: 56px`
  - `--kz-date-radius: 12px`
  - `--kz-date-pad: 16px`
  - `--kz-date-cell: 38px`
  - `--kz-date-ease: cubic-bezier(0.22, 1, 0.36, 1)`
- Attributes:
  - `data-date`
  - `data-locale` (e.g. `en-GB`)
  - `data-step`
  - `data-week-start`
- Lifecycle: `kodza:init` / `kodza:destroy` on `document`, with `{ detail: { root } }` to target a container.

## Keyboard

What each key does, by where the focus is. Keep it working when you adapt the HTML: same elements, same classes.

- On a day of the calendar (focus in `.kodza-date__day`):
  - `ArrowLeft` / `ArrowRight`: Previous or next day
  - `ArrowUp` / `ArrowDown`: Previous or next week
  - `Home` / `End`: First or last day of the week
  - `PageUp` / `PageDown`: Previous or next month
  - `Enter` / `Space`: Picks the day, closes, focus back on the field
- On the field (focus in `.kodza-date__trigger`):
  - `Enter` / `Space`: Opens the calendar on the chosen day
- Anywhere, while it's open (while `.kodza-date.is-open` is on the page):
  - `Escape`: Closes it, focus back on the field

## Dark mode

The values Kodza uses on a dark background (`#0a0a0a`). For a page that follows the system theme, add them after the component's CSS:

```css
@media (prefers-color-scheme: dark) {
  .kodza-date {
    --kz-date-bg: #161616;
    --kz-date-fg: #f2f2f0;
    --kz-date-muted: rgba(242, 242, 240, 0.62);
    --kz-date-line: rgba(255, 255, 255, 0.14);
    --kz-date-line-hover: rgba(255, 255, 255, 0.3);
    --kz-date-soft: rgba(255, 255, 255, 0.08);
    --kz-date-ink: #f2f2f0;
    --kz-date-on-ink: #0a0a0a;
    --kz-date-shadow: 0 18px 40px -16px rgba(0, 0, 0, 0.8);
  }
}
```

A site with its own theme switch puts the same rules under its dark selector instead (`[data-theme="dark"] .kodza-date { … }`); a single dark section, under that section's class.

## Use it

### Plain HTML page

- CSS: `kodza/kodza-date-picker.css` next to the page (the Files commands as they are), linked in `<head>`: `<link rel="stylesheet" href="kodza/kodza-date-picker.css">`. Without a shell, paste it in a `<style>` in `<head>` instead. It only touches `kodza-` classes.
- HTML: where the component goes. Paste it as many times as you need: instances never interfere.
- JS: `kodza/kodza-date-picker.js`, loaded with `<script src="kodza/kodza-date-picker.js" defer></script>` in `<head>`. Without a shell, paste it in a `<script>` before `</body>` (or in `<head>`: it waits for the page). One copy per page, whatever the number of instances.
- Restyle with the `--kz-…` variables, set on the component's root element itself (the root declares its own defaults, so a value on an ancestor is ignored), and with the modifiers / attributes listed under API.
- Font: it takes the page's own. The Kodza look is Geist: `<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Geist:wght@400;500;600;700&family=Geist+Mono:wght@400;500&display=swap">`.
- Content added later (AJAX navigation, a SPA route, a builder preview): start it with `document.dispatchEvent(new CustomEvent('kodza:init', { detail: { root: container } }))`; before removing it, the same call with `'kodza:destroy'` stops it and puts the original markup back.

### Claude artifact (claude.ai)

- Paste the CSS in a `<style>` and the JS in a `<script>` at the end, in the artifact itself: it loads stylesheets only from Google Fonts and scripts only from a few CDNs, so no `<link>` or `<script src>` to Kodza.
- Writing the artifact file with a shell? Insert the downloaded files (Files) with a command instead of retyping them: a line `KODZA-CSS` alone inside the `<style>`, `KODZA-JS` inside the `<script>`, then `sed -e '/^KODZA-CSS$/{r kodza/kodza-date-picker.css' -e 'd' -e '}' -e '/^KODZA-JS$/{r kodza/kodza-date-picker.js' -e 'd' -e '}' page.html > artifact.html`.
- Font: load Geist from Google Fonts (allowed): `<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Geist:wght@400;500;600;700&family=Geist+Mono:wght@400;500&display=swap">`.
- Dark mode: the viewer sets `data-theme="dark"` or `"light"` on `<html>`, or nothing when it follows the system. Write the Dark mode rules twice: inside `@media (prefers-color-scheme: dark)` with `:root:not([data-theme="light"])` in front of each selector, and with `:root[data-theme="dark"]` in front of each selector.
- Forms: there is nowhere to send them. Handle `submit` in your script with `event.preventDefault()` and show the result in the page.

### WordPress

- HTML: a **Custom HTML** block (or a pattern / template part). WordPress keeps this markup as it is only for users allowed to post unfiltered HTML (Administrators; Super Admins on multisite): for anyone else it strips tags such as `<svg>`, `<input>` or `<dialog>`, so add it from the theme (a pattern or template part) instead.
- CSS and JS: the downloaded files go in the theme, under `wp-content/themes/<your-theme>/kodza/` (the child theme if there is one), enqueued from its functions.php (or a code-snippets plugin):
  ```php
  add_action('wp_enqueue_scripts', function () {
    $dir = get_stylesheet_directory() . '/kodza/';
    $uri = get_stylesheet_directory_uri() . '/kodza/';
    wp_enqueue_style('kodza-date-picker', $uri . 'kodza-date-picker.css', [], filemtime($dir . 'kodza-date-picker.css'));
    wp_enqueue_script('kodza-date-picker', $uri . 'kodza-date-picker.js', [], filemtime($dir . 'kodza-date-picker.js'), true);
  });
  ```
  Scoped to `kodza-` classes, the CSS never touches the theme. One copy of the JS, whatever the number of blocks.
- No access to the theme files? The CSS can also go, as it is, in **Appearance → Customize → Additional CSS** (classic theme) or **Styles → Additional CSS** in the Site Editor (block theme).
- Theme with AJAX page transitions: fire `kodza:init` on the new content after each swap (and `kodza:destroy` on the old one).
- Performance plugin (WP Rocket, LiteSpeed Cache, Perfmatters…) with **Delay JavaScript execution** turned on: add `kodza` to the scripts it must not delay. Otherwise the component waits for the visitor's first scroll, tap or mouse move, and that first click can be lost.
- Colours: by default, match the theme's palette. After the component's CSS, point these variables at the theme's colours, on the component root, Kodza's value as the fallback:
  `.kodza-date { --kz-date-fg: var(TEXT, #0a0a0a); --kz-date-bg: var(BACKGROUND, #ffffff); --kz-date-ink: var(ACCENT, #0a0a0a); --kz-date-on-ink: var(BACKGROUND, #ffffff); }`
  TEXT, BACKGROUND and ACCENT (the colour the theme fills its own buttons with) are the theme's own colour variables — block themes (theme.json, like Twenty Twenty-Five): `--wp--preset--color--contrast`, `--wp--preset--color--base`, `--wp--preset--color--contrast` (they fill their buttons with it; their accent-1… colours are decorative); Astra: `--ast-global-color-2`, `--ast-global-color-4`, `--ast-global-color-0`; Kadence: `--global-palette3`, `--global-palette9`, `--global-palette1`; GeneratePress: `--contrast`, `--base-3`, `--accent`; Blocksy: `--theme-palette-color-4`, `--theme-palette-color-8`, `--theme-palette-color-1`. Use only these names, and only if the site really has them (the theme's CSS, or Styles → Colors): the `--wp--preset--color--black`, `--white`, `--vivid-…` that WordPress adds everywhere are not the theme's palette. Another theme, or one without these variables (Hello Elementor, OceanWP): leave the variables alone, it keeps Kodza's monochrome; same when the developer asks for monochrome or the Kodza look. Leave the translucent greys (`rgba(10, 10, 10, …)`) as they are: they suit any light background. On a dark palette, set the other variables from Dark mode too.
- WordPress turns straight quotes and `--` into typographic ones in the text of a Custom HTML block (not inside `<code>` or `<pre>`).

#### With Elementor

- HTML: an **HTML** widget (Elementor shows it to administrators only). It keeps the code exactly as pasted, straight quotes included.
- CSS and JS: as above. Elementor's Site Settings → Theme Style styles every button, field, link and image of the page, components included; the theme guard at the end of the CSS keeps the component's buttons, fields and link colours as they are.
- The Elementor editor redraws each widget after the page has loaded: without the script below, the component stays still in the editor preview (the published page works). Add it once per site, in the footer like the component's script (`kodza/elementor-editor.js`, or a code-snippets plugin):

```js
// Kodza in the Elementor editor: the editor redraws each HTML widget after the page has loaded.
// Start Kodza in what it draws, stop it in what it replaces or removes. Once per site.
window.addEventListener('elementor/frontend/init', () => {
  if (!elementorFrontend.isEditMode()) return;
  class KodzaWidget extends elementorModules.frontend.handlers.Base {
    onInit() {
      super.onInit();
      this.kodza = [...this.$element[0].children];
      document.dispatchEvent(new CustomEvent('kodza:init', { detail: { root: this.$element[0] } }));
    }
    onDestroy() {
      super.onDestroy();
      this.kodza.forEach((root) => document.dispatchEvent(new CustomEvent('kodza:destroy', { detail: { root } })));
    }
  }
  elementorFrontend.elementsHandler.attachHandler('html', KodzaWidget);
});
```

- No child theme: everything can go in the HTML widget instead, `<style>` with the CSS, the HTML, then `<script>` with the JS. It works on the page and in the editor without the script above.

### Shopify

- Files: `assets/kodza-date-picker.css` and `assets/kodza-date-picker.js` (the Files commands with `-o assets/…`).
- In the section: `{{ 'kodza-date-picker.css' | asset_url | stylesheet_tag }}` and `<script src="{{ 'kodza-date-picker.js' | asset_url }}" defer></script>`, then the HTML.
- The theme editor re-renders sections: restart them with
  `document.addEventListener('shopify:section:load', (e) => document.dispatchEvent(new CustomEvent('kodza:init', { detail: { root: e.target } })));`
  and the same with `shopify:section:unload` → `kodza:destroy`.

### React / Next.js

- Files, side by side (e.g. in `components/kodza/`): `DatePicker.tsx` (below), the CSS block under Code saved as `date-picker.css` and the JS block as `date-picker.js`, both as they are. The HTML block is already inside the component: skip it.
- Use it: `import { DatePicker } from '@/components/kodza/DatePicker';` then `<DatePicker>Launch day</DatePicker>`. Props: `locale` (`data-locale`: "en-GB"), `vars` (the `--kz-…` variables listed under API, e.g. `vars={{ '--kz-date-bg': … }}`), `children` (the text, plain), `className`, `style` and the other props of its `<label>` (`onClick`, `aria-…`).
- Next.js App Router: it is a Client Component already (`'use client'`). Pages Router: Next.js takes global CSS only in `pages/_app`, so move the `import './date-picker.css'` line there.
- Safe under StrictMode, client-side navigation and prop changes: when a prop changes, the `key` gives React a fresh element, `kodza:destroy` stops the script on the old one and `kodza:init` starts it on the new one.

```tsx
'use client';
// Kodza — Date Picker, for React. From https://kodza.dev/components/date-picker/
// Kodza License: free to use, client work included. Not to resell or redistribute, ported or not: https://kodza.dev/docs/#print-license
// Next to this file: date-picker.css and date-picker.js, the component's CSS and JS from Kodza, as they are.
// Yours to edit: the markup is plain JSX below.
// The script changes this markup once React has rendered it (it adds layers, splits text, moves
// nodes), so React must not patch it afterwards. When a prop changes, the key gives React a fresh
// element: kodza:destroy stops the script on the old one, kodza:init starts it on the new one.
import { useRef, useEffect, type ComponentPropsWithoutRef, type ComponentRef, type CSSProperties } from 'react';
import './date-picker.css';

export type DatePickerProps = Omit<ComponentPropsWithoutRef<'label'>, "children" | "vars" | "locale"> & {
  /** data-locale on the root (default: en-GB) */
  locale?: "en-GB";
  /** Settings, as CSS variables on the root */
  vars?: {
    /** default: #ffffff */
    "--kz-date-bg"?: string | number;
    /** default: #0a0a0a */
    "--kz-date-fg"?: string | number;
    /** default: rgba(10, 10, 10, 0.6) */
    "--kz-date-muted"?: string | number;
    /** default: rgba(10, 10, 10, 0.14) */
    "--kz-date-line"?: string | number;
    /** default: rgba(10, 10, 10, 0.3) */
    "--kz-date-line-hover"?: string | number;
    /** default: rgba(10, 10, 10, 0.06) */
    "--kz-date-soft"?: string | number;
    /** default: #0a0a0a */
    "--kz-date-ink"?: string | number;
    /** default: #ffffff */
    "--kz-date-on-ink"?: string | number;
    /** default: 0 18px 40px -16px rgba(10, 10, 10, 0.3) */
    "--kz-date-shadow"?: string | number;
    /** default: 56px */
    "--kz-date-height"?: string | number;
    /** default: 12px */
    "--kz-date-radius"?: string | number;
    /** default: 16px */
    "--kz-date-pad"?: string | number;
    /** default: 38px */
    "--kz-date-cell"?: string | number;
    /** default: cubic-bezier(0.22, 1, 0.36, 1) */
    "--kz-date-ease"?: string | number;
  };
  /** The text, plain: the script reads it and rebuilds the markup around it */
  children?: string;
  className?: string;
};

export function DatePicker({ locale = "en-GB", vars, children = "Launch day", className, style, ...rest }: DatePickerProps) {
  const ref = useRef<ComponentRef<'label'>>(null);
  const classes = ["kodza-date", className].filter(Boolean).join(' ');
  // Everything the markup is made of: when it changes, React gets a fresh element (see the top)
  const key = JSON.stringify([classes, locale, vars, children, style, rest]);

  // Starts the script on this element once React has rendered it, stops it when it goes
  useEffect(() => {
    const root = ref.current;
    let live = true;
    // @ts-ignore: a plain script, no types to find
    import('./date-picker.js').then(() => {
      if (live) document.dispatchEvent(new CustomEvent('kodza:init', { detail: { root } }));
    });
    return () => {
      live = false;
      document.dispatchEvent(new CustomEvent('kodza:destroy', { detail: { root } }));
    };
  }, [key]);

  return (
    <label key={key} {...rest} className={classes} data-locale={locale} style={{ ...vars, ...style } as CSSProperties} ref={ref}>
      <span className="kodza-date__label">{children}</span>
      {' '}
      <input className="kodza-date__native" type="date" name="launch" defaultValue="2026-10-23" />
    </label>
  );
}
```

## Code

```html
<label class="kodza-date" data-locale="en-GB">
  <span class="kodza-date__label">Launch day</span>
  <input class="kodza-date__native" type="date" name="launch" value="2026-10-23">
</label>
```

```css
/* Kodza License: free to use, client work included. Not to resell or redistribute, ported or not: https://kodza.dev/docs/#print-license */
/* Kodza — Date Picker
   A real date input, dressed up: the field shows the date in words, and a calendar
   unrolls under it. Months slide sideways in the direction you go, the month name rolls, and
   the ink mark travels to the day you pick before the calendar closes. Today wears a ring;
   days outside min / max are off. Arrows, Page Up / Down, Home / End, Enter, Escape.
   Same box as Select. Everything is tuned with the --kz-date-* variables. */
.kodza-date {
  --kz-date-bg: #ffffff;
  --kz-date-fg: #0a0a0a;
  --kz-date-muted: rgba(10, 10, 10, 0.6);
  --kz-date-line: rgba(10, 10, 10, 0.14);
  --kz-date-line-hover: rgba(10, 10, 10, 0.3);
  --kz-date-soft: rgba(10, 10, 10, 0.06);
  --kz-date-ink: #0a0a0a;
  --kz-date-on-ink: #ffffff;
  --kz-date-shadow: 0 18px 40px -16px rgba(10, 10, 10, 0.3);
  --kz-date-height: 56px;
  --kz-date-radius: 12px;
  --kz-date-pad: 16px;
  --kz-date-cell: 38px;
  --kz-date-ease: cubic-bezier(0.22, 1, 0.36, 1);

  position: relative;
  display: block;
  width: 100%;
  max-width: 320px;
  /* The closed panel keeps its size, ready to unroll, but never lengthens the page */
  contain: layout;
  /* A number, not auto, so it can wait for the panel to roll up before dropping back */
  z-index: 0;
  transition: z-index 0s linear 0.4s;
  color: var(--kz-date-fg);
}

/* Open, the field rises above what follows it (its panel included) */
.kodza-date.is-open {
  z-index: 20;
  transition-delay: 0s;
}

.kodza-date__label {
  position: absolute;
  top: 10px;
  left: var(--kz-date-pad);
  z-index: 1;
  color: var(--kz-date-muted);
  font-size: 12px;
  line-height: 1;
  pointer-events: none;
}

.kodza-date__native,
.kodza-date__trigger {
  display: flex;
  align-items: flex-end;
  width: 100%;
  height: var(--kz-date-height);
  margin: 0;
  padding: 0 44px 9px var(--kz-date-pad);
  border: 0;
  border-radius: var(--kz-date-radius);
  background: var(--kz-date-bg);
  box-shadow: inset 0 0 0 1px var(--kz-date-line);
  box-sizing: border-box;
  color: inherit;
  font: inherit;
  font-size: 15px;
  line-height: 22px;
  text-align: left;
  cursor: pointer;
  transition: box-shadow 0.25s ease;
}

.kodza-date__native:hover,
.kodza-date__trigger:hover {
  box-shadow: inset 0 0 0 1px var(--kz-date-line-hover);
}

.kodza-date__native:focus-visible,
.kodza-date__trigger:focus-visible,
.kodza-date.is-open .kodza-date__trigger {
  outline: none;
  box-shadow: inset 0 0 0 1.5px var(--kz-date-fg), 0 0 0 4px var(--kz-date-soft);
}

.kodza-date.is-ready .kodza-date__native {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  clip-path: inset(50%);
}

.kodza-date__value {
  display: inline-grid;
  overflow: hidden;
}

.kodza-date__value > span {
  grid-area: 1 / 1;
  white-space: nowrap;
}

.kodza-date__value .is-empty {
  color: var(--kz-date-muted);
}

.kodza-date__icon {
  position: absolute;
  top: calc(var(--kz-date-height) / 2 - 9px);
  right: 16px;
  width: 18px;
  height: 18px;
  fill: none;
  stroke: var(--kz-date-muted);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  pointer-events: none;
}

/* The calendar unrolls under the field */
.kodza-date__pop {
  position: absolute;
  top: calc(var(--kz-date-height) + 8px);
  left: 0;
  z-index: 20;
  width: calc(var(--kz-date-cell) * 7 + 24px);
  padding: 12px;
  border-radius: 16px;
  background: var(--kz-date-bg);
  box-shadow: 0 0 0 1px var(--kz-date-line), var(--kz-date-shadow);
  box-sizing: border-box;
  visibility: hidden;
  opacity: 0;
  clip-path: inset(0 0 100% 0 round 16px);
  transform: translateY(-4px);
  transition:
    clip-path 0.4s var(--kz-date-ease),
    opacity 0.2s ease,
    transform 0.4s var(--kz-date-ease),
    visibility 0s linear 0.4s;
}

.kodza-date.is-open .kodza-date__pop {
  visibility: visible;
  opacity: 1;
  clip-path: inset(-40px -40px -60px -40px round 16px);
  transform: none;
  transition-delay: 0s;
}

.kodza-date.is-above .kodza-date__pop {
  top: auto;
  bottom: calc(var(--kz-date-height) + 8px);
  clip-path: inset(100% 0 0 0 round 16px);
  transform: translateY(4px);
}

.kodza-date.is-above.is-open .kodza-date__pop {
  clip-path: inset(-60px -40px -40px -40px round 16px);
  transform: none;
}

.kodza-date__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  padding-left: 6px;
}

.kodza-date__month {
  display: inline-grid;
  overflow: hidden;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.kodza-date__month > span {
  grid-area: 1 / 1;
  white-space: nowrap;
}

.kodza-date__nav {
  display: flex;
  gap: 2px;
}

.kodza-date__nav button,
.kodza-date__today {
  display: grid;
  place-items: center;
  height: 32px;
  border: 0;
  border-radius: 999px;
  background: none;
  color: inherit;
  font: inherit;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.kodza-date__nav button {
  width: 32px;
  padding: 0;
}

.kodza-date__nav button:hover,
.kodza-date__today:hover {
  background: var(--kz-date-soft);
}

.kodza-date__nav svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.kodza-date__weekdays,
.kodza-date__days {
  display: grid;
  grid-template-columns: repeat(7, var(--kz-date-cell));
}

.kodza-date__weekdays {
  margin: 0;
  padding: 0;
  list-style: none;
}

.kodza-date__weekdays span {
  display: grid;
  place-items: center;
  height: 28px;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 11px;
  color: var(--kz-date-muted);
}

/* Months share one cell: the old one leaves, the new one comes in from the side you go */
.kodza-date__stage {
  display: grid;
  overflow: hidden;
}

.kodza-date__days {
  position: relative;
  grid-area: 1 / 1;
  grid-auto-rows: var(--kz-date-cell);
  align-content: start;
  height: calc(var(--kz-date-cell) * 6);
}

.kodza-date__day {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: var(--kz-date-cell);
  height: var(--kz-date-cell);
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: none;
  color: inherit;
  font: inherit;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
  transition: color 0.2s ease 0.1s, background-color 0.2s ease;
}

.kodza-date__day:hover {
  background: var(--kz-date-soft);
}

.kodza-date__day.is-outside {
  color: var(--kz-date-muted);
}

.kodza-date__day.is-today::after {
  content: "";
  position: absolute;
  inset: 4px;
  border-radius: 50%;
  box-shadow: inset 0 0 0 1px var(--kz-date-line-hover);
}

.kodza-date__day[aria-selected="true"] {
  color: var(--kz-date-on-ink);
}

.kodza-date__day[aria-selected="true"]:hover {
  background: none;
}

.kodza-date__day:disabled {
  color: var(--kz-date-muted);
  opacity: 0.4;
  cursor: not-allowed;
}

.kodza-date__day:focus-visible,
.kodza-date__nav button:focus-visible,
.kodza-date__today:focus-visible {
  outline: 2px solid var(--kz-date-fg);
  outline-offset: -2px;
}

/* The ink mark, one per month: it travels to the day you pick */
.kodza-date__mark {
  position: absolute;
  top: 0;
  left: 0;
  width: var(--kz-date-cell);
  height: var(--kz-date-cell);
  border-radius: 50%;
  background: var(--kz-date-ink);
  transform: translate(var(--kz-mark-x, 0), var(--kz-mark-y, 0));
  transition: transform 0.4s var(--kz-date-ease), opacity 0.2s ease;
}

.kodza-date__mark.is-hidden {
  opacity: 0;
  transform: translate(var(--kz-mark-x, 0), var(--kz-mark-y, 0)) scale(0.4);
}

.kodza-date__foot {
  display: flex;
  justify-content: flex-end;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--kz-date-soft);
}

.kodza-date__today {
  padding: 0 12px;
  font-size: 13px;
  font-weight: 500;
}

@media (prefers-reduced-motion: reduce) {
  .kodza-date__native,
  .kodza-date__trigger,
  .kodza-date__pop,
  .kodza-date__day,
  .kodza-date__mark {
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
  }
}

/* Theming example — on a dark background:
.dark-section .kodza-date {
  --kz-date-bg: #161616;
  --kz-date-fg: #f2f2f0;
  --kz-date-muted: rgba(242, 242, 240, 0.62);
  --kz-date-line: rgba(255, 255, 255, 0.14);
  --kz-date-line-hover: rgba(255, 255, 255, 0.3);
  --kz-date-soft: rgba(255, 255, 255, 0.08);
  --kz-date-ink: #f2f2f0;
  --kz-date-on-ink: #0a0a0a;
  --kz-date-shadow: 0 18px 40px -16px rgba(0, 0, 0, 0.8);
}
*/

/* kodza-guard 18d93fa7dbb5 — generated by Kodza, do not edit.
   Theme guard: keeps a site's own CSS (WordPress themes, Bootstrap, CSS resets…) off this
   component. :not(#_) is always true and weighs as much as an id, so these lines win over
   theme rules made of classes and tags. Customise the component through its --kz-* variables. */

/* What the browser gives, where the component sets it only in some states: at the lowest weight, so its own rules below put it back */

:where(.kodza-date__native):not(#_) {
  outline: revert;
  position: revert;
}

:where(.kodza-date__trigger):not(#_) {
  outline: revert;
}

:where(.kodza-date__day):not(#_),
:where(.kodza-date__today):not(#_),
:where(.kodza-date__nav button:where(:not([class*="kodza-"]))):not(#_) {
  outline: revert;
  outline-offset: revert;
}

/* What the browser gives, on everything the component leaves to it */

.kodza-date:not(#_) {
  border: revert;
  padding: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  list-style: revert;
  box-sizing: revert;
  background-color: revert;
  background-image: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-height: revert;
  font-family: revert;
  font-size: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-date__label:not(#_),
.kodza-date__value:not(#_),
.kodza-date__head:not(#_),
.kodza-date__month:not(#_),
.kodza-date__nav:not(#_),
.kodza-date__weekdays:not(#_),
.kodza-date__stage:not(#_),
.kodza-date__days:not(#_),
.kodza-date__mark:not(#_),
.kodza-date__foot:not(#_),
.kodza-date__value span:where(:not([class*="kodza-"])):not(#_),
.kodza-date__month span:where(:not([class*="kodza-"])):not(#_),
.kodza-date__weekdays span:where(:not([class*="kodza-"])):not(#_) {
  box-sizing: revert;
}

.kodza-date__native:not(#_) {
  text-decoration: revert;
  list-style: revert;
  float: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
  white-space: revert;
  min-height: revert;
}

.kodza-date__trigger:not(#_) {
  text-decoration: revert;
  list-style: revert;
  float: revert;
  position: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
  white-space: revert;
  min-height: revert;
}

.kodza-date__icon:not(#_) {
  border: revert;
  margin: revert;
  padding: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  background-color: revert;
  background-image: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  color: revert;
  font-family: revert;
  font-size: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-date__day:not(#_) {
  margin: revert;
  text-decoration: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  box-shadow: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
  white-space: revert;
  min-height: revert;
}

.kodza-date__today:not(#_),
.kodza-date__nav button:where(:not([class*="kodza-"])):not(#_) {
  margin: revert;
  text-decoration: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  box-shadow: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
  white-space: revert;
  min-height: revert;
}

.kodza-date__nav svg:where(:not([class*="kodza-"])):not(#_) {
  border: revert;
  margin: revert;
  padding: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  background-color: revert;
  background-image: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  color: revert;
  font-family: revert;
  font-size: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-date__icon:not(#_):where(:not([hidden])),
.kodza-date__nav svg:where(:not([class*="kodza-"])):not(#_):where(:not([hidden])) {
  display: revert;
}

.kodza-date__icon:not(#_):where([hidden]),
.kodza-date__nav svg:where(:not([class*="kodza-"])):not(#_):where([hidden]) {
  display: none;
}

.kodza-date__day:not(#_)::after {
  box-sizing: revert;
}

/* The component's own rules, one step stronger: real buttons and fields, what it sets on tags themes style (links, lists, headings, images…), and the root width (a theme may narrow it, never widen it) */

.kodza-date:not(#_) {
  position: relative;
  display: block;
  transition: z-index 0s linear 0.4s;
  color: var(--kz-date-fg);
}

.kodza-date:not(#_) {
  width: min(100%, 320px);
}

.kodza-date.is-open:not(#_) {
  transition-delay: 0s;
}

.kodza-date__native:not(#_),
.kodza-date__trigger:not(#_) {
  display: flex;
  align-items: flex-end;
  width: 100%;
  height: var(--kz-date-height);
  margin: 0;
  padding: 0 44px 9px var(--kz-date-pad);
  border: 0;
  border-radius: var(--kz-date-radius);
  background: var(--kz-date-bg);
  box-shadow: inset 0 0 0 1px var(--kz-date-line);
  box-sizing: border-box;
  color: inherit;
  font: inherit;
  font-size: 15px;
  line-height: 22px;
  text-align: left;
  cursor: pointer;
  transition: box-shadow 0.25s ease;
}

.kodza-date__native:hover:not(#_),
.kodza-date__trigger:hover:not(#_) {
  box-shadow: inset 0 0 0 1px var(--kz-date-line-hover);
}

.kodza-date__native:focus-visible:not(#_),
.kodza-date__trigger:focus-visible:not(#_),
.kodza-date.is-open .kodza-date__trigger:not(#_) {
  outline: none;
  box-shadow: inset 0 0 0 1.5px var(--kz-date-fg), 0 0 0 4px var(--kz-date-soft);
}

.kodza-date.is-ready .kodza-date__native:not(#_) {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  clip-path: inset(50%);
}

.kodza-date__icon:not(#_) {
  position: absolute;
}

.kodza-date__nav button:not(#_),
.kodza-date__today:not(#_) {
  display: grid;
  place-items: center;
  height: 32px;
  border: 0;
  border-radius: 999px;
  background: none;
  color: inherit;
  font: inherit;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.kodza-date__nav button:not(#_) {
  width: 32px;
  padding: 0;
}

.kodza-date__nav button:hover:not(#_),
.kodza-date__today:hover:not(#_) {
  background: var(--kz-date-soft);
}

.kodza-date__day:not(#_) {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: var(--kz-date-cell);
  height: var(--kz-date-cell);
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: none;
  color: inherit;
  font: inherit;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
  transition: color 0.2s ease 0.1s, background-color 0.2s ease;
}

.kodza-date__day:hover:not(#_) {
  background: var(--kz-date-soft);
}

.kodza-date__day.is-outside:not(#_) {
  color: var(--kz-date-muted);
}

.kodza-date__day.is-today:not(#_)::after {
  content: "";
  position: absolute;
  inset: 4px;
  border-radius: 50%;
  box-shadow: inset 0 0 0 1px var(--kz-date-line-hover);
}

.kodza-date__day[aria-selected="true"]:not(#_) {
  color: var(--kz-date-on-ink);
}

.kodza-date__day[aria-selected="true"]:hover:not(#_) {
  background: none;
}

.kodza-date__day:disabled:not(#_) {
  color: var(--kz-date-muted);
  opacity: 0.4;
  cursor: not-allowed;
}

.kodza-date__day:focus-visible:not(#_),
.kodza-date__nav button:focus-visible:not(#_),
.kodza-date__today:focus-visible:not(#_) {
  outline: 2px solid var(--kz-date-fg);
  outline-offset: -2px;
}

.kodza-date__today:not(#_) {
  padding: 0 12px;
  font-size: 13px;
  font-weight: 500;
}

@media (prefers-reduced-motion: reduce) {
  .kodza-date__native:not(#_),
  .kodza-date__trigger:not(#_),
  .kodza-date__day:not(#_) {
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
  }
}
```

```js
// Kodza License: free to use, client work included. Not to resell or redistribute, ported or not: https://kodza.dev/docs/#print-license
// Kodza — Date Picker
// Builds a field and a calendar over the real <input type="date"> and keeps it in step (firing
// "input" and "change" on it). Weeks start on Monday (data-week-start="0" for Sunday), names
// come from data-locale (or the page language). The calendar is a grid of buttons with one
// focusable day: arrows move by day and week, Page Up / Down by month, Home / End to the
// start and end of the week, Enter picks, Escape closes and gives the focus back.
(() => {
  const SELECTOR = '.kodza-date';
  const reduceMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
  const ease = 'cubic-bezier(0.22, 1, 0.36, 1)';
  const iso = (d) => `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}-${String(d.getDate()).padStart(2, '0')}`;
  const parse = (value) => {
    const m = /^(\d{4})-(\d{2})-(\d{2})$/.exec(value || '');
    return m ? new Date(Number(m[1]), Number(m[2]) - 1, Number(m[3])) : null;
  };
  const addDays = (d, n) => new Date(d.getFullYear(), d.getMonth(), d.getDate() + n);
  const same = (a, b) => a && b && iso(a) === iso(b);
  const icon = '<svg class="kodza-date__icon" viewBox="0 0 18 18" aria-hidden="true"><rect x="2.5" y="3.5" width="13" height="12" rx="2.5"/><path d="M2.5 7.5h13M6 2v3M12 2v3"/></svg>';
  const arrow = (d) => `<svg viewBox="0 0 16 16" aria-hidden="true"><path d="${d}"/></svg>`;
  let uid = 0;

  // A word or a month name rolls to its new value (up going forward, down going back)
  const roll = (box, text, dir = 1) => {
    const prev = box.lastElementChild;
    if (prev && prev.textContent === text) return;
    const span = Object.assign(document.createElement('span'), { textContent: text });
    box.append(span);
    if (!prev) return;
    if (reduceMotion) return prev.remove();
    const timing = { duration: 420, easing: ease };
    prev.animate([{ transform: 'none' }, { transform: `translateY(${dir * -110}%)` }], { ...timing, fill: 'forwards' }).finished.then(() => prev.remove());
    span.animate([{ transform: `translateY(${dir * 110}%)` }, { transform: 'none' }], timing);
  };

  // One instance. Everything it starts is tied to `signal`, so kodza:destroy stops it all
  function mount(root, signal) {
    const native = root.querySelector('.kodza-date__native');
    const label = root.querySelector('.kodza-date__label');
    if (!native) return;
    const id = `kodza-date-${++uid}`;
    const locale = root.dataset.locale || document.documentElement.lang || undefined;
    const weekStart = root.dataset.weekStart === '0' ? 0 : 1;
    const long = new Intl.DateTimeFormat(locale, { weekday: 'short', day: 'numeric', month: 'short', year: 'numeric' });
    const monthName = new Intl.DateTimeFormat(locale, { month: 'long', year: 'numeric' });
    const dayName = new Intl.DateTimeFormat(locale, { weekday: 'long', day: 'numeric', month: 'long', year: 'numeric' });
    const weekday = new Intl.DateTimeFormat(locale, { weekday: 'narrow' });
    const min = parse(native.min);
    const max = parse(native.max);
    const today = new Date();

    // The field
    const trigger = document.createElement('button');
    trigger.type = 'button';
    trigger.className = 'kodza-date__trigger';
    trigger.setAttribute('aria-haspopup', 'dialog');
    trigger.setAttribute('aria-expanded', 'false');
    if (label) {
      label.id = `${id}-label`;
      trigger.setAttribute('aria-labelledby', `${id}-label ${id}-value`);
    }
    const value = Object.assign(document.createElement('span'), { className: 'kodza-date__value', id: `${id}-value` });
    trigger.append(value);
    trigger.insertAdjacentHTML('beforeend', icon);

    // The calendar
    const pop = document.createElement('div');
    pop.className = 'kodza-date__pop';
    pop.setAttribute('role', 'dialog');
    pop.setAttribute('aria-label', label ? `${label.textContent}: choose a date` : 'Choose a date');
    pop.innerHTML = `
      <div class="kodza-date__head">
        <span class="kodza-date__month" aria-live="polite"></span>
        <span class="kodza-date__nav">
          <button type="button" data-step="-1" aria-label="Previous month">${arrow('M10 3.5 5.5 8l4.5 4.5')}</button>
          <button type="button" data-step="1" aria-label="Next month">${arrow('M6 3.5 10.5 8 6 12.5')}</button>
        </span>
      </div>
      <div class="kodza-date__weekdays" aria-hidden="true"></div>
      <div class="kodza-date__stage"></div>
      <div class="kodza-date__foot"><button class="kodza-date__today" type="button">Today</button></div>`;
    native.after(trigger, pop);
    native.tabIndex = -1;
    native.setAttribute('aria-hidden', 'true');
    const monthBox = pop.querySelector('.kodza-date__month');
    const stage = pop.querySelector('.kodza-date__stage');
    const weekdays = pop.querySelector('.kodza-date__weekdays');
    for (let i = 0; i < 7; i++) {
      const d = new Date(2024, 0, 1 + ((weekStart + i + 6) % 7));
      weekdays.append(Object.assign(document.createElement('span'), { textContent: weekday.format(d) }));
    }

    let selected = parse(native.value);
    let view = new Date((selected || today).getFullYear(), (selected || today).getMonth(), 1);
    let focusDay = selected || today;
    let grid = null;

    const disabled = (d) => (min && d < min) || (max && d > max);

    // One month: six weeks of buttons, and the ink mark on the chosen day
    const build = (month) => {
      const box = document.createElement('div');
      box.className = 'kodza-date__days';
      box.setAttribute('role', 'grid');
      const mark = Object.assign(document.createElement('span'), { className: 'kodza-date__mark is-hidden' });
      mark.setAttribute('aria-hidden', 'true');
      box.append(mark);
      const first = new Date(month.getFullYear(), month.getMonth(), 1);
      const offset = (first.getDay() - weekStart + 7) % 7;
      for (let i = 0; i < 42; i++) {
        const d = addDays(first, i - offset);
        const day = document.createElement('button');
        day.type = 'button';
        day.className = 'kodza-date__day';
        day.textContent = d.getDate();
        day.dataset.date = iso(d);
        day.tabIndex = -1;
        day.setAttribute('aria-label', dayName.format(d));
        if (d.getMonth() !== month.getMonth()) day.classList.add('is-outside');
        if (same(d, today)) {
          day.classList.add('is-today');
          day.setAttribute('aria-current', 'date');
        }
        day.disabled = !!disabled(d);
        box.append(day);
      }
      return box;
    };

    const placeMark = (box, animate) => {
      const mark = box.querySelector('.kodza-date__mark');
      const day = selected && box.querySelector(`[data-date="${iso(selected)}"]:not(.is-outside)`);
      box.querySelectorAll('.kodza-date__day').forEach((b) => b.setAttribute('aria-selected', String(b === day)));
      if (!day) return mark.classList.add('is-hidden');
      if (!animate) mark.style.transition = 'none';
      mark.style.setProperty('--kz-mark-x', `${day.offsetLeft}px`);
      mark.style.setProperty('--kz-mark-y', `${day.offsetTop}px`);
      mark.classList.remove('is-hidden');
      if (!animate) requestAnimationFrame(() => mark.style.removeProperty('transition'));
    };

    const setFocusable = () => {
      grid.querySelectorAll('.kodza-date__day').forEach((b) => (b.tabIndex = b.dataset.date === iso(focusDay) ? 0 : -1));
    };

    // Show a month: the old grid leaves on one side, the new one comes in from the other
    const render = (dir = 0) => {
      const next = build(view);
      const old = grid;
      const hadFocus = old?.contains(document.activeElement);
      grid = next;
      stage.append(next);
      roll(monthBox, monthName.format(view), dir || 1);
      placeMark(next, false);
      setFocusable();
      // The grid that held the focus is going away: the focus moves to the new one
      if (hadFocus) next.querySelector('[tabindex="0"]')?.focus({ preventScroll: true });
      if (old) {
        if (!dir || reduceMotion) old.remove();
        else {
          const timing = { duration: 380, easing: ease };
          old.animate([{ transform: 'none', opacity: 1 }, { transform: `translateX(${dir * -40}%)`, opacity: 0 }], { ...timing, fill: 'forwards' }).finished.then(() => old.remove());
          next.animate([{ transform: `translateX(${dir * 40}%)`, opacity: 0 }, { transform: 'none', opacity: 1 }], timing);
        }
      }
    };

    const showValue = (animate) => {
      const text = selected ? long.format(selected) : 'Pick a date';
      if (!animate) value.replaceChildren();
      roll(value, text, 1);
      value.lastElementChild.classList.toggle('is-empty', !selected);
    };

    const goToMonth = (d, dir) => {
      view = new Date(d.getFullYear(), d.getMonth(), 1);
      render(dir);
    };

    const moveFocus = (d) => {
      if (d.getMonth() !== view.getMonth() || d.getFullYear() !== view.getFullYear()) goToMonth(d, d > focusDay ? 1 : -1);
      focusDay = d;
      setFocusable();
      grid.querySelector(`[data-date="${iso(d)}"]`)?.focus({ preventScroll: true });
    };

    const isOpen = () => root.classList.contains('is-open');
    const open = () => {
      if (isOpen()) return;
      focusDay = selected || today;
      if (!grid || view.getMonth() !== focusDay.getMonth() || view.getFullYear() !== focusDay.getFullYear()) {
        view = new Date(focusDay.getFullYear(), focusDay.getMonth(), 1);
        grid?.remove();
        grid = null;
        render(0);
      }
      setFocusable();
      // Not enough room below: the calendar opens upwards. A closed panel that changes side gets
      // there at once, so it always unrolls from the field
      const box = trigger.getBoundingClientRect();
      const above = box.bottom + 380 > innerHeight && box.top > 380;
      if (above !== root.classList.contains('is-above')) {
        pop.style.transition = 'none';
        root.classList.toggle('is-above', above);
        void pop.offsetWidth;
        pop.style.transition = '';
      }
      root.classList.add('is-open');
      trigger.setAttribute('aria-expanded', 'true');
      requestAnimationFrame(() => grid.querySelector('[tabindex="0"]')?.focus({ preventScroll: true }));
    };
    const close = (refocus = true) => {
      if (!isOpen()) return;
      root.classList.remove('is-open');
      trigger.setAttribute('aria-expanded', 'false');
      if (refocus) trigger.focus({ preventScroll: true });
    };

    const pick = (d) => {
      if (!d || disabled(d)) return;
      const changed = !same(d, selected);
      if (d.getMonth() !== view.getMonth() || d.getFullYear() !== view.getFullYear()) goToMonth(d, d > (selected || view) ? 1 : -1);
      selected = d;
      focusDay = d;
      placeMark(grid, true);
      setFocusable();
      native.value = iso(d);
      showValue(true);
      if (changed) {
        native.dispatchEvent(new Event('input', { bubbles: true }));
        native.dispatchEvent(new Event('change', { bubbles: true }));
      }
      // Let the mark land, then close
      setTimeout(() => !signal.aborted && close(), reduceMotion ? 0 : 320);
    };

    trigger.addEventListener('click', () => (isOpen() ? close() : open()), { signal });
    pop.querySelectorAll('[data-step]').forEach((button) => button.addEventListener('click', () => {
      const step = Number(button.dataset.step);
      goToMonth(new Date(view.getFullYear(), view.getMonth() + step, 1), step);
      focusDay = new Date(view.getFullYear(), view.getMonth(), Math.min(focusDay.getDate(), 28));
      setFocusable();
    }, { signal }));
    pop.querySelector('.kodza-date__today').addEventListener('click', () => pick(new Date(today.getFullYear(), today.getMonth(), today.getDate())), { signal });
    stage.addEventListener('click', (event) => {
      const day = event.target.closest('.kodza-date__day');
      if (day && !day.disabled) pick(parse(day.dataset.date));
    }, { signal });
    pop.addEventListener('keydown', (event) => {
      if (event.key === 'Escape') {
        event.preventDefault();
        return close();
      }
      if (!event.target.classList.contains('kodza-date__day')) return;
      const dow = (focusDay.getDay() - weekStart + 7) % 7;
      // The same day a month away, or that month's last one (31 March, then 30 April)
      const monthAway = (n) => {
        const last = new Date(focusDay.getFullYear(), focusDay.getMonth() + n + 1, 0).getDate();
        return new Date(focusDay.getFullYear(), focusDay.getMonth() + n, Math.min(focusDay.getDate(), last));
      };
      const moves = {
        ArrowLeft: () => addDays(focusDay, -1),
        ArrowRight: () => addDays(focusDay, 1),
        ArrowUp: () => addDays(focusDay, -7),
        ArrowDown: () => addDays(focusDay, 7),
        Home: () => addDays(focusDay, -dow),
        End: () => addDays(focusDay, 6 - dow),
        PageUp: () => monthAway(-1),
        PageDown: () => monthAway(1),
      };
      if (moves[event.key]) {
        event.preventDefault();
        moveFocus(moves[event.key]());
      } else if (event.key === 'Enter' || event.key === ' ') {
        event.preventDefault();
        pick(focusDay);
      }
    }, { signal });
    // A click on the label text opens the calendar instead of reaching the hidden input
    root.addEventListener('click', (event) => {
      if (trigger.contains(event.target) || pop.contains(event.target)) return;
      event.preventDefault();
      trigger.focus();
    }, { signal });
    pop.addEventListener('click', (event) => event.preventDefault(), { signal });
    document.addEventListener('pointerdown', (event) => !root.contains(event.target) && close(false), { signal });
    // Escape closes it even if the focus wandered off to the page
    document.addEventListener('keydown', (event) => {
      if (event.key === 'Escape' && isOpen() && !root.contains(document.activeElement)) close();
    }, { signal });
    root.addEventListener('focusout', (event) => {
      if (isOpen() && event.relatedTarget && !root.contains(event.relatedTarget)) close(false);
    }, { signal });

    // The calendar is built right away, so the panel has its real size before it first opens
    render(0);
    showValue(false);
  }

  // Kodza lifecycle, the same in every component: `kodza:init` starts the instances inside
  // event.detail.root (the whole page by default), `kodza:destroy` stops them and puts their
  // markup back. For themes and apps that swap content without a page load.
  const instances = new WeakMap();
  const find = (scope = document) => [scope, ...scope.querySelectorAll(SELECTOR)].filter((el) => el.matches?.(SELECTOR));
  const init = (scope) => find(scope).forEach((root) => {
    if (root.classList.contains('is-ready')) return; // already running, maybe from another copy of this script
    const controller = new AbortController();
    instances.set(root, { controller, html: root.innerHTML, attrs: [...root.attributes].map((a) => [a.name, a.value]) });
    mount(root, controller.signal);
    root.classList.add('is-ready');
  });
  const destroy = (scope) => find(scope).forEach((root) => {
    const instance = instances.get(root);
    if (!instance) return;
    instances.delete(root);
    instance.controller.abort();
    [...root.attributes].forEach((a) => root.removeAttribute(a.name));
    instance.attrs.forEach(([name, value]) => root.setAttribute(name, value));
    root.innerHTML = instance.html;
  });
  document.addEventListener('kodza:init', (event) => init(event.detail?.root));
  document.addEventListener('kodza:destroy', (event) => destroy(event.detail?.root));
  init();
  // Loaded in <head>, the script runs before the markup exists: once more when it is parsed
  if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', () => init(), { once: true });
})();
```

Free to use, from Kodza (https://kodza.dev).