"Mon, 20 May 2024 18:03:51"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240520
Only TIME
18:03:51
General datetime
2024-05-20 18:03:51Z
For Database
2024-05-20 18:03:51
For HTTP1.1
Mon, 20 May 2024 18:03:51 GMT