What happens on el dia se los muertos (day of dead)

a Mexican celebration, is a day to celebrate, remember and prepare special foods in honor of those who have departed. ... It is believed that the spirit of the dead visit their families on October 31 and leave on November 2.

On dia de los muertos famillys put up ofrendas(offerings) to their family members that have passed away. They also decorate the graves. They decorate their homes with cempasuchil, or marigold in english, they cook their passed away family members favorite foods like mole, which is a sauce, usually made with chicken, which is a mixture of different nuts and chocolate. Hope this helps

(native spanish speaker)

no me gusta oler los calcetines.