This is the Calendar 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.
A rectangle with the short sides vertical. On top of this a rectangle of the same length, but 1/4 height. 1/4 of the way in from each side are two small upright rectangles, where half extends above the top of the small rectangle and half extends 1/4 into the small rectangle. Inside the large rectangle is the number "5"/