"Sun, 15 Dec 2024 21:54:45"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241215
Only TIME
21:54:45
General datetime
2024-12-15 21:54:45Z
For Database
2024-12-15 21:54:45
For HTTP1.1
Sun, 15 Dec 2024 21:54:45 GMT