"Sat, 21 Sep 2024 13:39:11"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240921
Only TIME
13:39:11
General datetime
2024-09-21 13:39:11Z
For Database
2024-09-21 13:39:11
For HTTP1.1
Sat, 21 Sep 2024 13:39:11 GMT