"Sun, 18 Aug 2024 21:36:53"

Convert date and time to unixtime.

Another datetime format string at UTC

YYYYMMDD
20240818

Only TIME
21:36:53

General datetime
2024-08-18 21:36:53Z

For Database
2024-08-18 21:36:53

For HTTP1.1
Sun, 18 Aug 2024 21:36:53 GMT