Consider the question. The Day of the Dead celebrations in Mexico developed from ancient traditions among its pre-Columbian cultures. Rituals celebrating the deaths of ancestors had been observed by these civilizations perhaps for as long as 2,500 -- 3,000 years. The festival that developed into the modern Day of the Dead fell in the ninth month of the Aztec calendar, about the beginning of August, and was celebrated for an entire month. The festivities were dedicated to the goddess known as the "Lady of the Dead", corresponding to the modern La Calavera Catrina.

Where did the day of the dead originate from?
If the answer is 'ancient traditions among its pre-Columbian cultures'; explain the reasoning:
The relevant information to answer the above question is: The Day of the Dead celebrations in Mexico developed from ancient traditions among its pre-Columbian cultures.