"Sat, 21 Sep 2024 09:15:40"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240921
Only TIME
09:15:40
General datetime
2024-09-21 09:15:40Z
For Database
2024-09-21 09:15:40
For HTTP1.1
Sat, 21 Sep 2024 09:15:40 GMT