Wouldn't it be great to display college institutional calendars within Moodle? Examples:

Student Role: Class registration deadlines financial aid, last day to drop/refund
Instructor Role: Grade submission deadlines, Enrollment cut offs, Committee meetings/information. 
Support Services Role: Production calendar, internal/external service info

It's completely possible with site calendar via an RSS feed but needs a little help from someone who can contribute code for it to be more useful.
Interested? Vote up the feature request to Moodle HQ: https://tracker.moodle.org/browse/MDL-70449 -- or contribute some code!