"Sun, 21 Jul 2024 06:15:56"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240721
Only TIME
06:15:56
General datetime
2024-07-21 06:15:56Z
For Database
2024-07-21 06:15:56
For HTTP1.1
Sun, 21 Jul 2024 06:15:56 GMT