"Mon, 20 May 2024 16:23:13"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240520
Only TIME
16:23:13
General datetime
2024-05-20 16:23:13Z
For Database
2024-05-20 16:23:13
For HTTP1.1
Mon, 20 May 2024 16:23:13 GMT