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