"Sat, 21 Dec 2024 08:00:03"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
08:00:03
General datetime
2024-12-21 08:00:03Z
For Database
2024-12-21 08:00:03
For HTTP1.1
Sat, 21 Dec 2024 08:00:03 GMT