The appears the be a calendar or notepad. It is a square with two triangles on it. One triangle points up and there is another triangle directly under it that points down. Both triangles are the same size as each other. There are two pegs on the top of the image.

Related icons are the icons with matching tags, as well as all time and date icons. All icons are in the same flat style. You can either download free PNG icons or buy SVG vectors