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