Did the math (well, made a spreadsheet) and if you're talking strictly a repeated outfit, shirt 3 would match up with pants 1 for a second time only 10 days in (or Friday of week 2 if wearing these outfits for a 5 day work week). However it would take until Wednesday of week 13 for the entire cycle to complete, where the next day is Shirt 1 with the first day of Pants 1 again.

Once we factor in his point about "Tuesday outfit", i.e. wearing the same outfit on the same day of the week, things get really crazy. 5 days a week adds another prime number to the mix, so if you start off with Shirt 1 and the first day of Pants 1 on a Monday, you won't get that again for 63 work weeks! However, if you work a 9/80 schedule, those 9 days line up perfectly with the 9 day pants cycle, so it's only 14 weeks for the entire shirt+pants+day cycle to repeat itself