Search builder does not display date picker for contacts
There was a small bug introduced in the last version where the calendar icon didn't show up in search builder date fields, but the actual datepicker still works fine.

The screenshots and videos are misleading, as they use Contact:Created Date as the example field - this is actually not a date field (despite the name) it is a Timestamp which doesn't work with the datepicker widget, unfortunately, so I don't believe this is a regression.

Edit: I stand corrected. Previous versions did provide a datepicker for timestamp fields, however it didn't work very well since it didn't allow you to specify time. I've created a fix to restore the datepicker and add a timepicker for those fields: https://github.com/civicrm/civicrm-core/pull/13249