These SQCD templates can be used at Background of a Sketch

The above pictures are all in the JPG file format.

The sketch Leanget in 3DLean can also display SVG files and typical raster graphics files such as PNG and JPG.

Scalable Vector Graphics (SVG) is an Extensible Markup Language (XML)-based vector image format for two-dimensional graphics with support for interactivity and animation. The SVG specification is an open standard developed by the World Wide Web Consortium (W3C) since 1999.

For example, you could make the weekend and holidays in a gray color, and even make them blink.

https://en.wikipedia.org/wiki/Scalable_Vector_Graphics

This example contains two zip files that can be downloaded. One contains the SQCD board template files in SVG and the second file contains the two transparent dots. The “dots” can be added to your sticker collection and used to place on top of each day of the month.