"Sun, 21 Jul 2024 17:11:38"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240721
Only TIME
17:11:38
General datetime
2024-07-21 17:11:38Z
For Database
2024-07-21 17:11:38
For HTTP1.1
Sun, 21 Jul 2024 17:11:38 GMT