"Sun, 21 Jul 2024 04:45:15"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240721
Only TIME
04:45:15
General datetime
2024-07-21 04:45:15Z
For Database
2024-07-21 04:45:15
For HTTP1.1
Sun, 21 Jul 2024 04:45:15 GMT