"Sat, 21 Sep 2024 04:20:14"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240921
Only TIME
04:20:14
General datetime
2024-09-21 04:20:14Z
For Database
2024-09-21 04:20:14
For HTTP1.1
Sat, 21 Sep 2024 04:20:14 GMT