"Sun, 15 Dec 2024 13:11:34"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241215
Only TIME
13:11:34
General datetime
2024-12-15 13:11:34Z
For Database
2024-12-15 13:11:34
For HTTP1.1
Sun, 15 Dec 2024 13:11:34 GMT