There was actually a DMX events calendar as a DW extension very back then. Actually now as I am writting this I remember I did create a page which was full of old school DMXzone tools and it actually still exists!
You can see the events calendar at the right (but it does not have any events assigned). You had the option to give several colors to the evens so it is easier to categorize them.
With a tear falling form my left eye I pass you the link