Well, as I said, I had an event system set up that basically began a timer at the start of the game. This timer controlled the day-to-night sequence and initialized the random weather generator. If you slept at an inn, it automatically bumped the "game time" to the next day. It all had a controlled day, day of the week week, month, and year system set up and an item that allowed you to pull the information to see the time, day, day of the week, month, and year.
I could easily institute it with this system, I think, but as I said, I have to go back and completely redo my system since I lost all the event scripting for it. I was mostly just curious to see if anyone had another solution. I'll be sure to check out your Calendar System, though.