"Mon, 20 May 2024 22:21:36"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240520
Only TIME
22:21:36
General datetime
2024-05-20 22:21:36Z
For Database
2024-05-20 22:21:36
For HTTP1.1
Mon, 20 May 2024 22:21:36 GMT