For a stay of 7 nights or less you get Trash & Towel service on your 4th day. Your trash is emptied and any towels you have used will be replaced. They are supposed to replace any used toiletries (shampoo, soap) but that doesn't always happen in my experience. Your check-in day is "day 1" so your T&T service would be on Saturday. You can ask to have it done on a different day if you would prefer since you will be checking out on day five.
For stays of 8 nights or more, you get a full cleaning (including changing the sheets) on day 4, T&T on day 8, cleaning on day 12, etc.