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 cant do it. I'm sure it is a simple thing but i cant find the answer yet.