Having a calendar that automatically updates every year is very nice. Those who would like to have this ability so that they can quickly and easily continue to enter information about their business should use excel for these needs. When they enter the information into excel, they are going to have a perpetual calendar that keeps updating for them for all of time.
This means that they can see what day of the week certain important dates are going to fall in future years. That can actually be highly important to some businesses who have certain dates that are important to their ability to make more money.