"Sun, 15 Sep 2024 23:18:38"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
23:18:38
General datetime
2024-09-15 23:18:38Z
For Database
2024-09-15 23:18:38
For HTTP1.1
Sun, 15 Sep 2024 23:18:38 GMT