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