"Mon, 20 May 2024 14:11:43"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240520
Only TIME
14:11:43
General datetime
2024-05-20 14:11:43Z
For Database
2024-05-20 14:11:43
For HTTP1.1
Mon, 20 May 2024 14:11:43 GMT