This Event Accepted 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 4,400 icons, all in the same style and quality.
This icon is a small rectangular calendar. At the top are two spiral bindings and the calendar has a star imprinted in it. At the bottom right of the calendar sits a small circle with a checkmark in the center of it.