"Mon, 27 May 2024 13:21:13"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240527
Only TIME
13:21:13
General datetime
2024-05-27 13:21:13Z
For Database
2024-05-27 13:21:13
For HTTP1.1
Mon, 27 May 2024 13:21:13 GMT