"The phone required the stylus for fine control."
It looks you were using a Windows CE/Mobile phone. Windows Phone never required a stylus, and no Windows Phone was ever sold with one.
Entering the "settings" menu in Windows Phone in the Calendar app is "touch the three dots and then Settings" - and still there's nothing much you can do in Settings that needs to be accessed so often.
So it looks you're actually talking about the wrong product...