"Sat, 21 Dec 2024 15:14:56"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
15:14:56
General datetime
2024-12-21 15:14:56Z
For Database
2024-12-21 15:14:56
For HTTP1.1
Sat, 21 Dec 2024 15:14:56 GMT