Wall calendars often have a horizontal stripe with a small window highlighting the current date. That would help solve the problem of forgetting to update it. Y

Wall calendars often have a horizontal stripe with a small window highlighting the current date. That would help solve the problem of forgetting to update it. You'd still need to remember how many days there are in the current month and you need to know the current date and day of the week to set it up but at least it seems workable.