"Mon, 20 May 2024 12:33:15"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240520
Only TIME
12:33:15
General datetime
2024-05-20 12:33:15Z
For Database
2024-05-20 12:33:15
For HTTP1.1
Mon, 20 May 2024 12:33:15 GMT