"Sun, 15 Dec 2024 13:15:01"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241215
Only TIME
13:15:01
General datetime
2024-12-15 13:15:01Z
For Database
2024-12-15 13:15:01
For HTTP1.1
Sun, 15 Dec 2024 13:15:01 GMT