Mexican Independence Day is celebrated on September 15th and 16th, and in Oaxaca, this includes festivities like "El Grito" (the shout) in the Zocalo, followed by fireworks and patriotic celebrations.

El Grito (September 15th and 16th):

• The main celebration of Mexican Independence Day is on the night of September 15th and throughout the day on September 16th. 
• "El Grito" (the shout) commemorates the call for independence from Spain given by Miguel Hidalgo on September 15, 1810. 
• In Oaxaca, people gather in the Zocalo, and at 11 pm, the governor leads the shout from the Palacio de Gobierno balcony, followed by fireworks and patriotic displays. 
• The "Noche Mexicana" on the 15th involves parties, dancing, and fireworks nationwide. 
• In Oaxaca, you'll find "carritos" with patriotic decorations like flags, shields, pinwheels, hats, and horns, along with "tricolor" pastries.