International Women's Day (March 8) was first observed on March 8, 1911, in several European countries and the United States. The event aimed to draw attention to women's rights, working conditions, and social demands. During the inaugural celebrations, more than one million women and men participated in countries such as Germany, Austria, Denmark, and Switzerland, calling for voting rights, the right to work, and an end to gender-based discrimination. In the following years, International Women's Day gradually gained recognition in more countries and became a symbol of the struggle against gender inequality and the defense of women's rights. Over the decades, the day has been observed with rallies, speeches, and cultural and social programs worldwide. In some countries, it is recognized as an official holiday, with special events held to honor women's achievements. The inclusion of this observance in the Gregorian calendar was the result of a collective decision by women's rights activists and social organizations in the early twentieth century, aiming to raise public awareness about women's issues and encourage social and legal changes toward gender equality.