I would LOVE it if a calendar-type visualization was provided. (see below). Supersets has a visualization similar to this, and the absence of it in redash is really the only thing preventing me from migrating everything I’ve got to the Re:dash platform.

We’re currently not adding new visualizations at least until #3493 is merged. But you might be able to accomplish something similar using the heatmap chart type. It won’t be as nice, but can still show the needed data.