In Washington D.C., Secretary of State Hillary Clinton spoke at the International Women of Courage Awards, followed by first lady Michelle Obama, who told the recipients that by overcoming fear and speaking up they had inspired other women to use their voices as well.
"They have received death threats, they have been beaten, kidnapped, imprisoned, tortured," Obama said. "These women have accepted these risks, they have worked for change."
In her speech, Clinton said the U.S. is watching how the Middle East's democratic movements treat women, saying no government can succeed if it excludes half its people from important decisions.
Anti-feminist demonstrators tried in vain to outshout women in Cairo, but the women did not go home where they belong, as the men shouted.
About 1,000 women continued chanting for fair and equal opportunity for all Egyptian citizens, beyond gender, religion or class.
In Pasadena, a small group of women celebrated International Women's Day by walking across a Pasadena bridge.
It was part of a symbolic walk across bridges around the world for equal access to education, science, and technology, including the Millennium Bridge in London, the Golden Gate Bridge in San Francisco and New York's Brooklyn Bridge.
Also in Pasadena, the organization 50/50 Leadership gave its annual Women of the World Awards to women who work through non-profits and grassroots to make a difference.
"There are a lot of statistics that show that if you educate a girl, that's your best investment," said Andrea Herz, founder of Aid Still Required.
The celebration was not confined to the physical world.
Actor Daniel Craig, who has played the role of James Bond, transformed into a woman on YouTube in honor of Women's Day.