"Sun, 15 Dec 2024 14:45:39"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241215
Only TIME
14:45:39
General datetime
2024-12-15 14:45:39Z
For Database
2024-12-15 14:45:39
For HTTP1.1
Sun, 15 Dec 2024 14:45:39 GMT