jQuery UI Datepicker has no core styling

[johnjamesjacoby]

It's possible for plugins to enqueue the jQuery UI Datepicker widget, but doing so does not include any styling, and there is no recommended styling with it to match the color schemes in WordPress's administration area.

This is good in that developers can roll their own to match their needs, but it's bad in that there is no canonical recommended experience for end-users of those plugins.

Right now, the only real viable option is using the kinda-outdated jQuery UI styling generator as a starting off point, and working backwards from there. Even though WordPress core doesn't currently use the jQuery UI Datepicker internally, it might go a long way towards improving date & time experiences (I'm looking at you, post publish time.)

[johnjamesjacoby]

I've put together a base CSS file on Github, for consideration, iteration, and ideally core adoption someday. This way any interested parties can collaborate outside of Trac while we see how viable this is for core, and can come back here and report back any progress.

​https://github.com/stuttter/wp-datepicker-styling

[jdgrimes]

Related: #29420, #7665, #18909

I think it is a duplicate of #18909.

[jadpm]

I would also like to point out that lacking a common style for the builtin datepicker script means that each plugin using it adds its won, which causes several conflicts and overrides.

I strongly hope to see this landing soon.

[swissspidy]

Duplicate of #18909.