Women's Union Establishment Day is a significant national holiday in the Southeast Asian country of Laos. Celebrated annually on July 20th, it commemorates the establishment of the Lao Women's Union, previously known as the Lao Women's Association, which was founded on this same date back in 1955. The union has played a crucial role in the country's development, advocating for women's rights, participating actively in the process of national liberation, revolution, and construction, and working vigorously towards gender equality.

On Women's Union Establishment Day, a variety of spirited activities and events are conducted across Laos. These events highlight the significant achievements and contributions of Laotian women to social, economic, and political fields. There may also be campaign rallies and seminars that focus on raising awareness for pertinent issues such as children’s rights, family planning, and gender-based violence. Often, the government and various organizations award outstanding women for their contributions to the society.

Over the years, the Women's Union Establishment Day has evolved, reflecting the changes in societal dynamics within Laos while still honoring its foundations. From celebrating the original union members' bravery during times of national unrest and revolution, the holiday now carries a broader meaning, recognizing the overall contributions of all women in Laotian society. Despite advancements made, the day is also a reminder that there is still much work to be done in the pursuit of gender equality not just in Laos, but also globally.