In Mexico, the autumn equinox is closely linked to the Day of the Dead, which occurs shortly after. Celebrated on November 1st and 2nd, this festival honors deceased loved ones through vibrant altars known as ofrendas. During the equinox, visitors to places like Pyramid of the Sun in Teotihuacan witness the sun casting a shadow that resembles a serpent, symbolizing the cycle of life and death. This blending of events emphasizes the connection between the living and the dead, enriching the cultural significance of both celebrations.