[wp-trac] [WordPress Trac] #51721: wp-admin/js/post.(min.)js does not successfully validate post dates within years 0000—0100

[WordPress Trac]

#51721: wp-admin/js/post.(min.)js does not successfully validate post dates within
years 0000—0100
----------------------------+-----------------------------
 Reporter:  wongjn          |      Owner:  (none)
     Type:  defect (bug)    |     Status:  new
 Priority:  normal          |  Milestone:  Awaiting Review
Component:  General         |    Version:  trunk
 Severity:  normal          |   Keywords:
  Focuses:  ui, javascript  |
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 When adding or editing a post, `wp-admin/js/post.(min.)js` does not
 correctly set the year on a JavaScript `Date` object when validating the
 post date.

 == To reproduce:

 1. Add or edit a post
 2. In the ''Publish'' meta box, click ''Edit'' next to the publish date.
 3. Enter a validate date, with the year in the range 0—100.
 4. See that the date input is highlighted red and marked invalid.

 == In depth

 This happens because in JavaScript, when passing a two-digit year to the
 `Date` constructor, it thinks that it is for the 1900 century. Even
 passing a string such as `0050` seems to be type-casted to a number.
 [http://developer.mozilla.org/en-
 US/docs/Web/JavaScript/Reference/Global_Objects/Date#Two_digit_years_map_to_1900_%E2%80%93_1999
 See more on MDN].

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Ticket URL: <https://core.trac.wordpress.org/ticket/51721>
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