Mexico City's Zocalo welcomed Independence Day festivities on Sept. 15 and 16. Large crowds arrived for the annual Cry of Independence ceremony. The Zocalo is the capital's principal square. It filled with people for the occasion. Telemundo and Univision were at the Zocalo and covered the ceremony live. The celebration marks Mexico's independence. It attracted people to the central square. Organizers planned events for both days. The annual observance is a major national occasion. The event ran on both days of the celebration.