If you have created a schedule on Tuesday -- and you realize you need to change it to Thursday.
Here are your options:
a) Delete the schedule on the 4 Create Schedule Page, and then Edit the Time Slots for the right day on the 3 Time Slots page. Then create the schedule again.
b) If you don't want to delete the schedule because you've made custom changes, you can add new time slots for the right day. Then update each game on the 4 Create Schedule Page to the right time slot using the Time Slot drop-down.