March 7 (UPI) -- People worldwide celebrated International Women's Day on Thursday, marking the occasion with a call for feminine equality under a banner of rights and empowerment. "This year's theme calls for action that can unlock equal rights, power and opportunities for all and a feminist future where no one is left behind," a release from the United Nations said. "Central to this vision is empowering the next generation -- youth, particularly young women and adolescent girls-as catalysts