Cancel This Day refunds every non-refunded meal on that date, marks the date Canceled, and optionally updates the next renewal date (Update next renew day to:). Unlike a skip, no replacement date is created and there is no un-cancel button for a single day, so use it when the customer should lose that delivery for good (for example after you refunded it to their wallet). Canceled days are hidden from the calendar strip at the top of the page (they still count in the day's history log); use See all dates to find them. If you need the day back, the practical option is to skip a different open day with Create new day? left ticked, which adds a fresh open date after the customer's last scheduled date.