Labor Day is a holiday that is celebrated on the first Monday of September in the United States. The word 'labor' is pronounced as 'ley-ber' with the stress on the first syllable. The 'a' in 'labor' is pronounced as 'ah' and the 'o' is pronounced as 'er.'

The origin of Labor Day dates back to the late 19th century when labor unions emerged as a powerful force in the United States. The first Labor Day parade was held in New York City in 1882, and it became a federal holiday in 1894.

On Labor Day, many people take a day off from work to enjoy the last days of summer. They may have picnics, barbecues, or go to the beach. It is also a time to recognize and celebrate the contributions of workers to society.

In conclusion, Labor Day is an important holiday in the United States that honors the hard work and dedication of workers. It is pronounced as 'ley-ber' with the stress on the first syllable.