why march 8 is celebrated as womens day?

On March 8, 1857, hundreds of women workers in garment and textile factories in New York City staged a strike against low wages, long working hours and inhumane working conditions. In August 1910, at a meeting in Copenhagen, the Women's Socialist International decided to commemorate the strike by observing an annual International Women's Day (IWD). This is where we can find the roots of IWD. In 1975, during International Women's Year, the United Nations (UN) began celebrating March 8 as IWD.

In adopting its resolution on the observance of Women's Day, the UN General Assembly cited two reasons: to recognize the fact that securing peace and social progress and the full enjoyment of human rights and fundamental freedoms require the active participation, equality and development of women; and to acknowledge the contribution of women to the strengthening of international peace and security.

For women, the Day offers an occasion to review how far they have come in their struggle for equality, peace and development. It is also an opportunity to unite, network and mobilize for meaningful change.