3. Save the changes and you'll be prompted to "Shift" or "Do Not Shift" your lessons.
Choosing "Shift" will move all of your lessons to accommodate for the added snow day to save you time so you don't have to move those individually.
Choosing "Do Not Shift" will remove all lessons on dates of your event.
Please note that you will NOT be prompted to shift/do not shift if your schedule in a cycle and those lessons will shift automatically.