hehe...It's a convention I picked up from college, and it makes sense to me. I suppose it could be another T, but I'd rather not deal with that ambiguity. The big, and most obvious different between Tues and Thurs, to me, is the R in Thursday. I suppose it could be an H, or something, or maybe one day move it to 2 letter abbreviations, but for now, I think the R works just fine.
---- The day Microsoft makes a product that doesn't suck is the day they make a vacuum cleaner.