"Sat, 21 Dec 2024 13:23:56"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
13:23:56
General datetime
2024-12-21 13:23:56Z
For Database
2024-12-21 13:23:56
For HTTP1.1
Sat, 21 Dec 2024 13:23:56 GMT