"Sun, 15 Dec 2024 20:21:45"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241215
Only TIME
20:21:45
General datetime
2024-12-15 20:21:45Z
For Database
2024-12-15 20:21:45
For HTTP1.1
Sun, 15 Dec 2024 20:21:45 GMT