"Mon, 20 May 2024 12:44:11"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240520
Only TIME
12:44:11
General datetime
2024-05-20 12:44:11Z
For Database
2024-05-20 12:44:11
For HTTP1.1
Mon, 20 May 2024 12:44:11 GMT