"Sat, 21 Sep 2024 09:15:13"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240921
Only TIME
09:15:13
General datetime
2024-09-21 09:15:13Z
For Database
2024-09-21 09:15:13
For HTTP1.1
Sat, 21 Sep 2024 09:15:13 GMT