"Mon, 15 Apr 2024 20:15:31"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240415
Only TIME
20:15:31
General datetime
2024-04-15 20:15:31Z
For Database
2024-04-15 20:15:31
For HTTP1.1
Mon, 15 Apr 2024 20:15:31 GMT