"Mon, 20 May 2024 12:44:18"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240520
Only TIME
12:44:18
General datetime
2024-05-20 12:44:18Z
For Database
2024-05-20 12:44:18
For HTTP1.1
Mon, 20 May 2024 12:44:18 GMT