Halloween originates from the Celtic festival of Samhain, and as it spread around the world, it blended with local cultures and evolved into vastly different ways of celebration.

Ireland is the birthplace of Halloween. The ancient Samhain customs are best preserved here, with bonfire gatherings, masked parades, and carved turnip jack-o'-lanterns as local traditions. On Halloween night, people play divination games, which legend says can reveal the future.

Scotland also carries on ancient Celtic customs. In the past, people lit bonfires to drive away spirits, and children would put on old clothes as disguises and go door to door asking for food. Many places still keep the Halloween game of nut divination.

Mexico's Day of the Dead (Día de los Muertos), while not the same as Halloween, is the most famous holiday honoring the departed. People build colorful altars with photos of the deceased, marigolds, and food, not to mourn but to welcome family souls home for reunion.

In Canada, Halloween traditions are similar to those in the United States, with neighborhood trick-or-treating, pumpkin carving, and family parties all popular. Many communities hold themed parades, making it the family favorite autumn festival activity.

In some European countries, the Halloween atmosphere is more subdued. The UK has seen a rise in pumpkin carving and parties in recent years, but many areas still lean toward church services honoring All Saints' Day; Spain and Portugal focus more on remembering the departed.

In Asia, celebrations are mostly light and commercialized. Malls and cafes create Halloween-themed decorations, and young people enjoy dressing up for photo ops, mostly downplaying the ghostly meaning and treating it as a lighthearted themed party.

Although customs vary greatly from place to place, the core is the same: confronting life and death, and using a special ritual at the end of autumn to experience wonder and togetherness.