"Sun, 15 Sep 2024 21:49:19"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
21:49:19
General datetime
2024-09-15 21:49:19Z
For Database
2024-09-15 21:49:19
For HTTP1.1
Sun, 15 Sep 2024 21:49:19 GMT