It's a logo of a calendar page. There are two rings on top then a page coming down with a line near the top of the page. On the larger lower part of the calendar page are the letters "Fr" representing Friday.
This Friday icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 5,500 icons, all in the same style and quality.