"Sun, 15 Dec 2024 21:11:13"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241215
Only TIME
21:11:13
General datetime
2024-12-15 21:11:13Z
For Database
2024-12-15 21:11:13
For HTTP1.1
Sun, 15 Dec 2024 21:11:13 GMT