If you have to cancel a class due to unforeseen circumstances, Punchpass will allow you to cancel it.
You can cancel right from the "Classes" calendar view within Punchpass:
Or you can go into to the affected class time & click "Edit Class". You'll click the button to mark the class as canceled.
Do you need to cancel ALL classes on a particular day? When you're in the "Classes" view, just use the little arrow on that date to cancel all of that day's classes.
When a class has been marked canceled, that class shows as canceled on your public schedule page and reservations are no longer accepted.
If some reservations have already been made for that class, you must still delete the reservations at the time of cancellation. You may also need to email the affected customers -- you can do that right from the class page after you've canceled it.
If you want to post a special notice to your calendar, here's more on that.