Google has created a special Doodle to honor International Women's Day, complete with a short video. That video, which features more than 100 women from around the world, includes two openly transgender women. Author, speaker, and transgender rights activist Janet Mock and Transgender Law Center senior strategist Cecilia Chung both appear in the clip.

Mock is the author of Redefining Realness, a New York Times best seller. Outside of her writing, she's made a name for herself as a vocal advocate for transgender rights, and more recently, as the target of Piers Morgan's exasperated Twitter rantings.

Cecilia Chung may not be as recognizable as Mock outside LGBT advocacy circles, but within, she's a well-established leader and a trailblazer in the fields of LGBT, human rights, and HIV and AIDS activism. Before joining Transgender Law Center, Chung was the first transgender woman chosen to lead the board of directors of the San Francisco Lesbian, Gay, Bisexual, and Transgender Pride celebration, and she is the former chair of the San Francisco Human Rights Commission.

International Women's Day has its roots in early-1900s feminist movements. Originating as National Women's Day in 1909, the event branched out into other countries after Clara Zetkin of Germany proposed that an international day of commemoration be formed at the 1910 International Conference of Working Women in Copenhagen. Modern-day celebrations occur annually on March 8, consisting of thousands of events worldwide celebrating women, their progress, and the path ahead.