"Sun, 15 Dec 2024 09:40:15"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241215
Only TIME
09:40:15
General datetime
2024-12-15 09:40:15Z
For Database
2024-12-15 09:40:15
For HTTP1.1
Sun, 15 Dec 2024 09:40:15 GMT