"Mon, 15 Apr 2024 18:21:37"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240415
Only TIME
18:21:37
General datetime
2024-04-15 18:21:37Z
For Database
2024-04-15 18:21:37
For HTTP1.1
Mon, 15 Apr 2024 18:21:37 GMT