A few changes are necessary for office hours. Because of today's 3:00 PM presentation (by Paul Astorino), office hours are canceled. They will be tomorrow instead from 1 to 4.
On next Tuesday (September 21st), I have a board meeting that I have to attend in the afternoon. (I will leave after class). So next week my regular Tuesday office hours will be on Monday instead.
Of course, you can always just set up an appointment or email.