"Sun, 15 Dec 2024 20:17:54"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241215
Only TIME
20:17:54
General datetime
2024-12-15 20:17:54Z
For Database
2024-12-15 20:17:54
For HTTP1.1
Sun, 15 Dec 2024 20:17:54 GMT