"Sat, 21 Dec 2024 14:42:48"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
14:42:48
General datetime
2024-12-21 14:42:48Z
For Database
2024-12-21 14:42:48
For HTTP1.1
Sat, 21 Dec 2024 14:42:48 GMT