This is a Calendar 18 icon. We've made it in iOS style, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 12,300 icons, all in the same style and quality.
This is logo for calendar 18. This icon has a picture of a page of a calendar and it appears to be hanging.There are two rectangle on the top to denote that it is hanging. In the picture the number 18 is displayed in it.