Comment by perilunar

Does the "double bosom" occlusion mechanism have a proper name? I always thought it was a bit daft — excusable on watches perhaps — but on larger clocks where there's plenty of space why not just have a half black sphere that rotates once per lunar month? (Even better would be a small model of the moon with a half black shade rotating around it).

Anyway: I made a (web) clock with that shows the moon position and phase: https://sunclock.net