Crossword puzzle clue "mo before labor day"

They may result from Labor Day labor

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

Labor Day day: Abbr.

The day after Labor Day: Abbr.

Mo. before Labor Day

Class that ends before labor day?

Day after day after day . . .

It has both National Cheese Day and National Cognac Day ... on the same day no less