"Sun, 15 Dec 2024 14:55:09"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241215
Only TIME
14:55:09
General datetime
2024-12-15 14:55:09Z
For Database
2024-12-15 14:55:09
For HTTP1.1
Sun, 15 Dec 2024 14:55:09 GMT