"Sat, 21 Sep 2024 05:15:19"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240921
Only TIME
05:15:19
General datetime
2024-09-21 05:15:19Z
For Database
2024-09-21 05:15:19
For HTTP1.1
Sat, 21 Sep 2024 05:15:19 GMT