Too Many Courses Have Assignments On The Same Day

Community Novice

I'm curious whether anyone can recommend a strategy to prevent teachers from multiple courses from assigning assignments on the same day?

Currently our students often find themselves overloaded with too many assignments from different courses being assigned on the same day. A pseudo-solution I've given teachers is to join colleagues' courses to see their calendars, but these teachers then find managing/viewing so many courses overwhelming. Another approach could be to create a master teacher-only course where they can all add their assignments to a single calendar, but some teachers may not appreciate having to do double duty. 

Is there another solution? Has anyone come across a strategy to better manage assignment dates among courses?

Many thanks for your consideration,