When I lived in Mexico city fifteen years ago, I was surprised to know the habit of celebrating at the graveyard to meet their deceased ancestors on the "Dia de Muert" niths, once a year. That day are same time as Halloween in US. They decorated the cemetery gorgeously and had a party all night. In Japan, the cemetery is a very sacred place so I was very surprised. I had a prejudice that the cemetery was scary, but it was surprisingly fun when I joined the party.