"Mon, 13 May 2024 14:11:56"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240513
Only TIME
14:11:56
General datetime
2024-05-13 14:11:56Z
For Database
2024-05-13 14:11:56
For HTTP1.1
Mon, 13 May 2024 14:11:56 GMT