"Sun, 15 Dec 2024 16:30:47"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241215
Only TIME
16:30:47
General datetime
2024-12-15 16:30:47Z
For Database
2024-12-15 16:30:47
For HTTP1.1
Sun, 15 Dec 2024 16:30:47 GMT