"Sun, 15 Dec 2024 17:15:10"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241215
Only TIME
17:15:10
General datetime
2024-12-15 17:15:10Z
For Database
2024-12-15 17:15:10
For HTTP1.1
Sun, 15 Dec 2024 17:15:10 GMT