"Sun, 15 Sep 2024 14:48:15"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
14:48:15
General datetime
2024-09-15 14:48:15Z
For Database
2024-09-15 14:48:15
For HTTP1.1
Sun, 15 Sep 2024 14:48:15 GMT