"Sun, 21 Jul 2024 18:31:18"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240721
Only TIME
18:31:18
General datetime
2024-07-21 18:31:18Z
For Database
2024-07-21 18:31:18
For HTTP1.1
Sun, 21 Jul 2024 18:31:18 GMT