If you have a Mac, you have a copy of Apple’s iCal calendar. It’s a nice little calendar, and it syncs with the iPhone, and there’s almost no reason not to use it. Especially when someone else types in the information! That’s where MarkThisDate comes in. MarkThisDate has zillions of calendars that are yours for the clicking– they jump right into your iCal and you can easily turn them off by unchecking a checkbox, or delete them all at once with just a couple of clicks.
Note: when you click those links you’ll be taken to iCal, where a box will appear asking you some questions about this new calendar that you are about to add. The key: tell the calendar to REFRESH every day (or at some other interval). You want it to refresh because you want updated information. For example, the NFL Playoff calendar as of this writing shows that San Diego beat Indianapolis in overtime, and that Arizona beat Atlanta. Very nice.