"Sun, 15 Dec 2024 14:54:03"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241215
Only TIME
14:54:03
General datetime
2024-12-15 14:54:03Z
For Database
2024-12-15 14:54:03
For HTTP1.1
Sun, 15 Dec 2024 14:54:03 GMT