"Mon, 13 May 2024 14:37:13"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240513
Only TIME
14:37:13
General datetime
2024-05-13 14:37:13Z
For Database
2024-05-13 14:37:13
For HTTP1.1
Mon, 13 May 2024 14:37:13 GMT