May Day, or Beltane; International Workers Day and Lei Day are all celebrated on May 1. Here's what to know about each holiday.

May Day, also known as International Workers' Day, honors labor, activists, other social justice issues and oftentimes immigrants' rights. The day is usually marked by rallies and marches ...

International Workers' Day, also known as May Day, happens every year on May 1. While it’s observed around the globe as a day to celebrate organized labor, May Day is an unrecognized holiday in ...