"Sat, 21 Dec 2024 09:20:13"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
09:20:13
General datetime
2024-12-21 09:20:13Z
For Database
2024-12-21 09:20:13
For HTTP1.1
Sat, 21 Dec 2024 09:20:13 GMT