The `date` and `end_date` fields are ''WP'' timestamps representing the venue's local time. As of meta:changeset:10270 (#meta4480), new `start_unix_timestamp` and `end_unix_timestamp` values are available, providing a proper ''Unix'' timestamp in the UTC timezone. Using those is more precise, and removes the time window where the event has expired but still appears in the Events Widget.
To simplify the function, it now only accepts and returns the events themselves, rather than the entire response body.
See #51130
See #meta4480
Related: https://make.wordpress.org/core/2019/09/23/date-time-improvements-wp-5-3/
Built from https://develop.svn.wordpress.org/trunk@49145
git-svn-id: http://core.svn.wordpress.org/trunk@48907 1a063a9b-81f0-0310-95a4-ce76da25c4cd