Changing the DAY on this analog watch.. My watch is the Timex Indiglo WR30M analog watch with a

Question

My watch is the Timex Indiglo WR30M analog watch with a big white face and black numbers/hands. The strap is metal. I know how to change the date and the time (by pulling the stem out to either the date or the time position), but how do I change the DAY? Right now, it's stuck on Monday the 2nd, however today is Sunday the 2nd.
Thanks!

-- Frank