"Sat, 21 Dec 2024 09:15:37"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
09:15:37
General datetime
2024-12-21 09:15:37Z
For Database
2024-12-21 09:15:37
For HTTP1.1
Sat, 21 Dec 2024 09:15:37 GMT