"Sun, 21 Jul 2024 03:38:14"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240721
Only TIME
03:38:14
General datetime
2024-07-21 03:38:14Z
For Database
2024-07-21 03:38:14
For HTTP1.1
Sun, 21 Jul 2024 03:38:14 GMT