Not a public holiday, but a legal national holiday observed on the second Sunday in May in the United States.

Mother's Day is celebrated across the world, in more than 50 countries, though not all countries celebrate it on the same day.

Countries that celebrate Mother's Day on the second Sunday of May include Australia, Denmark, Finland, Italy, Switzerland, Turkey, and Belgium. In Mexico and many parts of Latin America, Mother's Day is celebrated on May 10th of each year. In Thailand, it is celebrated on August 12th, the birthday of the current Queen.