"Mon, 20 May 2024 20:19:44"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240520
Only TIME
20:19:44
General datetime
2024-05-20 20:19:44Z
For Database
2024-05-20 20:19:44
For HTTP1.1
Mon, 20 May 2024 20:19:44 GMT