For many people this will not be a problem as the GreenBoxDay website provides a reminder text or email - which I have generally found to work well. We can also print out the calendar from the Council website.
However, if you do make a request, I am told the Council will deliver a calendar to your door.
My colleague, Councillor Jo Mowat has been requesting sticker calendars to put on the bins - as is done an some other local authorities. We're still working on that one.