The term "Hard coded" usually implies that a particular piece of code or routine is embedded or is an integral part of the internal function / operation of the software and is generally something that is not user accessible or modifiable.
For instance Auto Navigation systems will have "Hard Coded" turn commands that might say, Turn left ahead. The manufacturer wouldn't want the user to be able to change it to "Turn Left ahead is you feel like it or when there's a chance that you won't get hit."
Some things are simply designed to work in a way that the developer feels it would be best suited for the general population.
As I mentioned, Robert is aware and is looking into giving the users possible options to change the time settings.