"Sun, 15 Sep 2024 21:49:52"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
21:49:52
General datetime
2024-09-15 21:49:52Z
For Database
2024-09-15 21:49:52
For HTTP1.1
Sun, 15 Sep 2024 21:49:52 GMT