A friend of mine wanted to set up a calendar to print out for a couple of months - she is old school. To help I had a look around and in the process found a couple of online calendar generators.
But this one was the best - Time and date -
Not only did it have a very useful calendar maker but also a range of tools that are really useful for teaching students about time. With timers, countdowns, world clocks and time zone maps there is enough there to cover some great concepts right from you IWB.