It is a combination of two overlayed objects. The background object is a generic map-like object that has zig-zag top and bottom edges and dots scattered on it. The foreground object is a circle in the lower-right of the map that has a large "+5" text in it.
This is the Timezone +5 icon for Windows 10
. Here we go. Optimized for 32x32 px, these are the simplest icons in the line style. Downloadable formats are PNG and SVG, among others. Icons8 icon pack is unique in providing a huge number of icons designed by the same team of four designers who create the new icons every working day in the same style and with the same quality. Same cool as the Bat Face, huh.