"Sun, 15 Dec 2024 14:45:37"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241215
Only TIME
14:45:37
General datetime
2024-12-15 14:45:37Z
For Database
2024-12-15 14:45:37
For HTTP1.1
Sun, 15 Dec 2024 14:45:37 GMT