I use the calendar module and the views come with it.

What I want is: When my url is http:mysite/2015 display the year view and when my url is http:mysite/2015/03 display the month view (March of 2015). Of course the day same as well http:mysite/2015/03/16.

I try to change the path and contextual filters setting but I can't do that. I'm sure it is a simple thing but I can't find the answer yet.