"Sun, 15 Sep 2024 21:21:38"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
21:21:38
General datetime
2024-09-15 21:21:38Z
For Database
2024-09-15 21:21:38
For HTTP1.1
Sun, 15 Sep 2024 21:21:38 GMT