"Mon, 19 Feb 2024 20:15:09"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240219
Only TIME
20:15:09
General datetime
2024-02-19 20:15:09Z
For Database
2024-02-19 20:15:09
For HTTP1.1
Mon, 19 Feb 2024 20:15:09 GMT