Overview

• Publimetro reports the season change at 12:20 p.m. Central Time in Mexico City, while Star Walk lists the astronomical instant at 18:30.
• Milenio cites 12:19 as the start time, highlighting slight discrepancies across sources.
• The equinox is defined as the moment the Sun aligns with Earth’s equator, yielding nearly equal lengths of day and night.
• The shift ends astronomical summer and begins autumn, which continues until the December solstice.
• Visitors are expected at Chichén Itzá, Teotihuacán and Monte Albán for ceremonies and to witness effects such as the Kukulkán “serpent of light.”