(CNN) — Today (Friday) is a day to honor the achievements of women past and present, on International Women's Day.

It's an annual celebration of women's political, economic and social accomplishments.

Lost for inspiration? A few quotes from a few powerful women on International Women's Day.

Yahoo CEO Marissa Mayer: "If you can find something that you're really passionate about, whether you're a man or a woman comes a lot less into play. Passion is a gender-neutralizing force."

And businesswoman and philanthropist Melinda Gates: "Make sure you continue to trust what you know about yourself and stay true to what you believe in."