"Sun, 15 Sep 2024 18:49:17"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
18:49:17
General datetime
2024-09-15 18:49:17Z
For Database
2024-09-15 18:49:17
For HTTP1.1
Sun, 15 Sep 2024 18:49:17 GMT