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diff --git a/Collapse file: packages/date/README.md
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@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+### Enhancements
+
+-   Improved TypeScript definitions ([67573](https://github.com/WordPress/gutenberg/pull/67573))
+
 ## 5.29.0 (2025-08-20)
 
 ## 5.28.0 (2025-08-07)
 
@@ -28,8 +28,8 @@ _Related_
 _Parameters_
 
 -   _dateFormat_ `string`: PHP-style formatting string. See [php.net/date](https://www.php.net/manual/en/function.date.php).
--   _dateValue_ `Moment | Date | string | undefined`: Date object or string, parsable by moment.js.
--   _timezone_ `string | number | undefined`: Timezone to output result in or a UTC offset. Defaults to timezone from site.
+-   _dateValue_ `Moment | Date | string | number`: Date object or string, parsable by moment.js.
+-   _timezone_ `string`: Timezone to output result in or a UTC offset. Defaults to timezone from site.
 
 _Returns_
 
@@ -49,12 +49,12 @@ _Related_
 _Parameters_
 
 -   _dateFormat_ `string`: PHP-style formatting string. See [php.net/date](https://www.php.net/manual/en/function.date.php).
--   _dateValue_ `Moment | Date | string | undefined`: Date object or string, parsable by moment.js.
--   _timezone_ `string | number | boolean | undefined=`: Timezone to output result in or a UTC offset. Defaults to timezone from site. Notice: `boolean` is effectively deprecated, but still supported for backward compatibility reasons.
+-   _dateValue_ `Moment | Date | string | number`: Date object or string, parsable by moment.js.
+-   _timezone_ `string | number | boolean`: Timezone to output result in or a UTC offset. Defaults to timezone from site. Notice: `boolean` is effectively deprecated, but still supported for backward compatibility reasons.
 
 _Returns_
 
--   `string`: Formatted date.
+-   Formatted date.
 
 ### format
 
@@ -63,23 +63,23 @@ Formats a date. Does not alter the date's timezone.
 _Parameters_
 
 -   _dateFormat_ `string`: PHP-style formatting string. See [php.net/date](https://www.php.net/manual/en/function.date.php).
--   _dateValue_ `Moment | Date | string | undefined`: Date object or string, parsable by moment.js.
+-   _dateValue_ `Moment | Date | string | number`: Date object or string, parsable by moment.js.
 
 _Returns_
 
--   `string`: Formatted date.
+-   Formatted date.
 
 ### getDate
 
 Create and return a JavaScript Date Object from a date string in the WP timezone.
 
 _Parameters_
 
--   _dateString_ `?string`: Date formatted in the WP timezone.
+-   _dateString_ `string | null`: Date formatted in the WP timezone.
 
 _Returns_
 
--   `Date`: Date
+-   Date
 
 ### getSettings
 
@@ -96,11 +96,11 @@ Formats a date (like `date()` in PHP), in the UTC timezone.
 _Parameters_
 
 -   _dateFormat_ `string`: PHP-style formatting string. See [php.net/date](https://www.php.net/manual/en/function.date.php).
--   _dateValue_ `Moment | Date | string | undefined`: Date object or string, parsable by moment.js.
+-   _dateValue_ `Moment | Date | string | number`: Date object or string, parsable by moment.js.
 
 _Returns_
 
--   `string`: Formatted date in English.
+-   Formatted date in English.
 
 ### gmdateI18n
 
@@ -109,36 +109,36 @@ Formats a date (like `wp_date()` in PHP), translating it into site's locale and
 _Parameters_
 
 -   _dateFormat_ `string`: PHP-style formatting string. See [php.net/date](https://www.php.net/manual/en/function.date.php).
--   _dateValue_ `Moment | Date | string | undefined`: Date object or string, parsable by moment.js.
+-   _dateValue_ `Moment | Date | string | number`: Date object or string, parsable by moment.js.
 
 _Returns_
 
--   `string`: Formatted date.
+-   Formatted date.
 
 ### humanTimeDiff
 
 Returns a human-readable time difference between two dates, like human_time_diff() in PHP.
 
 _Parameters_
 
--   _from_ `Moment | Date | string`: From date, in the WP timezone.
--   _to_ `Moment | Date | string | undefined`: To date, formatted in the WP timezone.
+-   _from_ `Moment | Date | string | number`: From date, in the WP timezone.
+-   _to_ `Moment | Date | string | number`: To date, formatted in the WP timezone.
 
 _Returns_
 
--   `string`: Human-readable time difference.
+-   Human-readable time difference.
 
 ### isInTheFuture
 
 Check whether a date is considered in the future according to the WordPress settings.
 
 _Parameters_
 
--   _dateValue_ `string`: Date String or Date object in the Defined WP Timezone.
+-   _dateValue_ `Date | string | number`: Date String or Date object in the Defined WP Timezone.
 
 _Returns_
 
--   `boolean`: Is in the future.
+-   Is in the future.
 
 ### setSettings