"Sun, 15 Dec 2024 13:34:16"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241215
Only TIME
13:34:16
General datetime
2024-12-15 13:34:16Z
For Database
2024-12-15 13:34:16
For HTTP1.1
Sun, 15 Dec 2024 13:34:16 GMT