"Sun, 15 Sep 2024 18:49:12"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
18:49:12
General datetime
2024-09-15 18:49:12Z
For Database
2024-09-15 18:49:12
For HTTP1.1
Sun, 15 Sep 2024 18:49:12 GMT