"Sun, 15 Dec 2024 14:21:51"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241215
Only TIME
14:21:51
General datetime
2024-12-15 14:21:51Z
For Database
2024-12-15 14:21:51
For HTTP1.1
Sun, 15 Dec 2024 14:21:51 GMT