"Sat, 21 Sep 2024 15:21:38"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240921
Only TIME
15:21:38
General datetime
2024-09-21 15:21:38Z
For Database
2024-09-21 15:21:38
For HTTP1.1
Sat, 21 Sep 2024 15:21:38 GMT