"Sun, 21 Jul 2024 18:54:39"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240721
Only TIME
18:54:39
General datetime
2024-07-21 18:54:39Z
For Database
2024-07-21 18:54:39
For HTTP1.1
Sun, 21 Jul 2024 18:54:39 GMT