It's an icon of a calendar, set on the 26th day of the month. It's displayed as a square with two ring-like objects at the top, to indicate that the pages flip over. There is the number 26 in the center of the square.
This Calendar 26 icon is a responsive icon. This means that it's optimized for four resolutions, from tiny 16x16 until highly detailed 80x80. The style comes from the latest Microsoft Office
, which makes it perfect for any Windows applications, in particular, those with ribbon toolbar control. Unlike other icon packs that have merely hundreds of icons, this monster icon pack contains 15,900 icons, all in the same style and quality.