Crossword puzzle clue "noteworthy occurrence"

Noteworthy occurrence

Rare occurrence at the U.S. Open on Father's Day that's a common occurrence at the U.S. Open on Labor Day

Noteworthy features of rows 1-5, 6-10 and 11-15, in that order

Noteworthy years

Key of a noteworthy Bach mass

A feather in your ___ (noteworthy achievement)

Noteworthy inmates?

Noteworthy acts