This is a Timezone +4 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 12,400 icons, all in the same style and quality.
It consists of two objects, one superimposed on the other. In the background is a semi-folded, generic map that has a zig-zag top and bottom and is covered in small dots. In the foreground is a medium-sized circle with the text "+4" in the middle.