Here is some quick information about Dia De Muertos: For more go HERE
Even in Mexico, the customs vary depending on the area in Mexico.
"Day of the Dead (Día de Muertos), is a holiday where families welcome back the souls of their deceased relatives for a brief reunion that includes food, drink, and celebration.
A blend of Mesoamerican ritual, European religion and Spanish culture, the holiday is traditionally celebrated each year from November 1-2( but may include other days). According to tradition, the gates of heaven are opened at midnight on October 31 and the spirits of children can rejoin their families for 24 hours. The spirits of adults can do the same on November 2." - History.com
How It’s Celebrated Today
Today’s customs regarding Day of the Dead festivities have morphed over the years. Flowers, altars, food, and music are all integral parts of the holiday.
Families will gather during the night at the cemeteries, light candles, and place flowers on the burial sites of their lost loved ones. There is festive music and definitely no crying or grieving. This is a reflective and lively get-together honoring the deceased back to celebrate life and enjoy all the human things again.
Traditions
Ofrendas:
An ofrenda honors and celebrates the loved ones who have passed. They represent the four elements. Food illustrates the earth, Drinks symbolize water, a lit candle symbolizes fire, and the movement of tissue paper illustrates wind.
Pictures:
Photographs of the loved one are believed to draw in the souls of the people pictured. They show to whom the altar is dedicated and are often displayed in decorative frames.
Marigolds (Cempasúchil):
Cempasúchil are the flowers of the dead. The scent is thought to guide the spirits back with its intense color and pungent smell. Petals are sometimes spread in a path leading to the altar. Paper marigolds are also used and paired with incense.
Sugar Skulls (Calaveras):
Calaveras, symbolize life’s sweetness. They may also represent specific people and can be adorned with their names. Brightly and intricately decorated, sugar skulls are sold at Mexican grocery stores or online. Families also make them at home. Hand-painted ceramic sugar skulls are also very popular.
La Catrina:
It is believed that the Aztecs worshipped a goddess of death who protected their loved ones to help them into the next stages.
The figure above came from artist José Guadalupe Posada(1900). He drew skeletons this way to reflect other's aspirations to look like wealthy and aristocratic Europeans.
La Calavera Catrina is about your true self and not pretending to be someone else. No matter who you are and where you come from you will end up a skeleton like everyone else!
Papel Picado:
The brightly colored cut tissue paper originates from an Aztec tradition of using something similar to decorate religious sculptures, shrines, and burials. It's thought that the paper is cut so the soul can travel through the holes. It's also a symbol of the fragility of life.