"Sun, 15 Dec 2024 13:18:36"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241215
Only TIME
13:18:36
General datetime
2024-12-15 13:18:36Z
For Database
2024-12-15 13:18:36
For HTTP1.1
Sun, 15 Dec 2024 13:18:36 GMT