the Fitbit mobile app
Have your class schedule right on your wrist. Go for the basic set-up, or delve into the advanced settings to show breaks, change times. You can even set 2 different sets of times and period names, and indicate which days follow the alternate times. Basic setup can be done by having your timetable with you and entering one subject at a time (in the settings via the fitbit app on your phone that syncs with the watch).
Tap top left/right to go back/forward a day. Tap bottom right to return to current day. Tap bottom left to jump to second half of displayed day, OR scroll up with finger.
You have 3 days (72h) to trial for free. If you like it, you can purchase for $1.50 via the K-pay website, where you can use paypal or credit card. There is a surcharge for credit card, and applicable taxes for your region may be added.
The app requires permission to access the internet, so it can send you the purchase code and activate your licence once paid.