[Leftium]

OneView Calendar did this (even multi-year), but it seems dead, now:

- https://web.archive.org/web/20191029164736/http://www.onevie...

- https://hw.leftium.com/#/item/11846108

- https://hw.leftium.com/#/item/13601391

- Demo (try zooming out): https://web.archive.org/web/20191003004300/http://app.onevie...