"Sun, 15 Sep 2024 21:31:18"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
21:31:18
General datetime
2024-09-15 21:31:18Z
For Database
2024-09-15 21:31:18
For HTTP1.1
Sun, 15 Sep 2024 21:31:18 GMT