Later, it invented another holiday on 2 November, All Souls' Day, to honour dead people.To celebrate All Souls Day, people made big bonfires and dressed up as angels, devils, saints and witches.They lit candles in lanterns made of hollowed-out turnip or pumpkin to frighten away ghosts.On this night, people also travelled from village to village to ask for food.It was believed that any village that did not give food would have bad luck.Gradually, over the years, the Celtic, Roman and Catholic customs and holidays got mixed together,and finally 31 October became known as Halloween.In the nineteenth century, Irish immigrants took Halloween customs from Europe to the USA.Today, in the USA and the UK in particular,Halloween has become a special occasion for young people.In these countries, children wear spooky costumes and go from door to door saying 'Trick or treat!'and they are given sweets to take home.