November 1 – Día de Todos los Santos  – All Saints’ Day

Dead relatives and loved ones 18 years and younger are honored on All Saints’ Day, which precedes Day of the Dead (November 2). Candles, food, and flowers are left on graves and altars. This day, like many, blends ancient pre-Columbian and Catholic traditions. It is not a state holiday.

All Saints’ Day (also known as All Hallows, Solemnity of All Saints or The Feast of All Saints) is a solemnity celebrated on 1 November by the Catholic Church, and on the first Sunday after Pentecost in Eastern Catholicism, in honour of all the saints, known and unknown.
https://en.wikipedia.org/wiki/All_Saints%27_Day

https://www.eventsloscabos.com/2013/11/all-saints-day-dia-de-todos-los-santos/