"Tue, 21 May 2024 20:19:38"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240521
Only TIME
20:19:38
General datetime
2024-05-21 20:19:38Z
For Database
2024-05-21 20:19:38
For HTTP1.1
Tue, 21 May 2024 20:19:38 GMT