Idea of Calendar 2 Icon
There is a large square with the number 2 printed in side. On top of the rectangle butted against it is a short rectangle that is the same with as the square. From its top equally spaced is 2 vertical running tiny rectangles for the hinges.
This page contains the Calendar 2 vector icon, as well as variations of this icon in different visual styles, and related icons. All icons are in the flat vector style, however, differ by the line thickness, fill, and corner radius.