"Mon, 20 May 2024 14:37:22"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240520
Only TIME
14:37:22
General datetime
2024-05-20 14:37:22Z
For Database
2024-05-20 14:37:22
For HTTP1.1
Mon, 20 May 2024 14:37:22 GMT