"Tue, 21 May 2024 18:21:31"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240521
Only TIME
18:21:31
General datetime
2024-05-21 18:21:31Z
For Database
2024-05-21 18:21:31
For HTTP1.1
Tue, 21 May 2024 18:21:31 GMT