International Women's Day (IWD) is a global holiday celebrated annually on March 8 to commemorate the cultural, political, and socioeconomic achievements of women. It is also a focal point in the women's rights movement, bringing attention to issues such as gender equality, reproductive rights, and violence and abuse against women.

Spurred on by the universal female suffrage movement that had begun in New Zealand, IWD originated from labor movements in North America and Europe during the early 20^th century. The earliest version was purportedly a "Women's Day" organized by the Socialist Party of America in New York City February 28, 1909. This inspired German delegates at the 1910 International Socialist Women's Conference to propose "a special Women's Day" be organized annually, albeit with no set date; the following year saw the first demonstrations and commemorations of International Women's Day across Europe.

After women gained suffrage in Soviet Russia in 1917 (the beginning of the February Revolution), IWD was made a national holiday on March 8; it was subsequently celebrated on that date by the socialist movement and communist countries. The holiday was associated with far-left movements and governments until its adoption by the global feminist movement in the late 1960s. IWD became a mainstream global holiday following its adoption by the United Nations in 1975.

Chinese communists observed the holiday beginning in 1922, though it soon gained traction across the political spectrum: In 1927, Guangzhou saw a march of 25,000 women and male supporters, including representatives of the Kuomintang, the YWCA, and labor organizations. After the founding of the People's Republic of China on October 1, 1949, the State Council proclaimed on December 23 that March 8 would be made an official holiday, with women given a half-day off.