This is the number 9 inside of a box. There is a line drawn across the top of the box, about a quarter inch from the top. There's two little tabs at the top of the box.
This is a Calendar 9 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 13,300 icons, all in the same style and quality.