"Mon, 20 May 2024 13:31:38"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240520
Only TIME
13:31:38
General datetime
2024-05-20 13:31:38Z
For Database
2024-05-20 13:31:38
For HTTP1.1
Mon, 20 May 2024 13:31:38 GMT