"Tue, 21 May 2024 12:14:39"

Convert date and time to unixtime.

Another datetime format string at UTC

YYYYMMDD
20240521

Only TIME
12:14:39

General datetime
2024-05-21 12:14:39Z

For Database
2024-05-21 12:14:39

For HTTP1.1
Tue, 21 May 2024 12:14:39 GMT