Today is Labor Day in the United States and Canada.

Here’s a few facts about the end-of-summer holiday.

The holiday was promoted by labor unions to celebrate the importance of workers in the United States. The originator of the idea is disputed, with Matthew Maguire of the Central Labor Union and Peter J. McGuire of the American Federation of Labor being credited with the idea. The state of Oregon was the first to recognize Labor Day as a holiday in 1882. By the time it was made a federal holiday in 1894, 30 other states had already recognized it.

The holiday marks the traditional end of the summer season  and was once noted as the last day a person could fashionably wear white or seersucker. The day after Labor Day is also traditionally the first day of school in the U.S., although many places now go back to school earlier.

The holiday is celebrated on the first Monday of September, so this year, the holiday is as late as possible, which may seem especially jarring compared to last year when the holiday was as early as it could be, on September First.

Our question, what’s the origin of the term “seersucker”?

Today is also: Independence Day in Brazil, National Threatened Species Day in Australia and Victory Day in Mozambique. In the United States, it is unofficially National Acorn Squash Day and National Salami Day. It’s the birthday of Queen Elizabeth the First, musician Buddy Holly and artist Grandma Moses.