"Sun, 15 Sep 2024 21:26:31"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
21:26:31
General datetime
2024-09-15 21:26:31Z
For Database
2024-09-15 21:26:31
For HTTP1.1
Sun, 15 Sep 2024 21:26:31 GMT