"Sun, 15 Sep 2024 21:16:42"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
21:16:42
General datetime
2024-09-15 21:16:42Z
For Database
2024-09-15 21:16:42
For HTTP1.1
Sun, 15 Sep 2024 21:16:42 GMT