"Sun, 15 Dec 2024 12:43:56"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241215
Only TIME
12:43:56
General datetime
2024-12-15 12:43:56Z
For Database
2024-12-15 12:43:56
For HTTP1.1
Sun, 15 Dec 2024 12:43:56 GMT