Labour Day

noun2

1. •
   (US) The holiday marking the unofficial end of summer, held on the first Monday in September.

   • The Conception caught fire around 3:14 a.m. on Labor Day off Santa Cruz Island, about 20 miles away from the coast of mainland California. It was the last day of a three-day diving trip. — 2019
2. •
   An annual holiday held on May 1 to celebrate the economic and social achievements of workers.