"Mon, 20 May 2024 20:15:06"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240520
Only TIME
20:15:06
General datetime
2024-05-20 20:15:06Z
For Database
2024-05-20 20:15:06
For HTTP1.1
Mon, 20 May 2024 20:15:06 GMT