The jack o'lantern is one of Halloween's most prominent symbols. In Britain and Ireland, a turnip was, and sometimes still is, used but emigrants to America quickly adopted the pumpkin since it is much easier to carve. Families that celebrate Halloween will carve a pumpkin into a scary or comical face, and place a candle inside the hollowed out shell, creating a crude lantern. This is then placed on the home's doorstep on Halloween night in order to scare evil spirits away.

A variant of a Jack o'Lantern carried on a string is a feature of Punkie Night, celebrated the fourth Thursday of October in the village of Hinton St. George, Somerset. (In England, Celtic customs and language have lingered longest in the southwest.) For Punkie Night, children carry lanterns made from hollowed-out mangel-wurzels (these days pumpkins are used) with faces cut out of them around the village boundary, collecting money and singing the punkie song. Punkie is derived from pumpkin or punk, meaning tinder.

Though the custom is only attested over the last century, and the mangel wurzel itself was introduced into English agriculture in the later 18th century, "Punkie Night" appears to be much older, older even than the fable that now accounts for it. The story was about the wives of Hinton St. George who went looking for their wayward husbands at the fair held nearby at Chiselborough, the last Thursday in October, but first hollowed out mangel wurzels in order to make lanterns to light their way. The laboriously improvised lanterns are not so easily explained, but the reaction of drunken husbands to the eerie lights is perhaps more telling: they immediately identified the lights as "goolies," the restless spirits of children who had died before they were baptized — and fled in terror! Children carry the punkies now. The event has spread since ca 1960 to the neighboring village of Chiselborough.