"Tue, 21 May 2024 20:15:03"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240521
Only TIME
20:15:03
General datetime
2024-05-21 20:15:03Z
For Database
2024-05-21 20:15:03
For HTTP1.1
Tue, 21 May 2024 20:15:03 GMT