Originally, the Irish and English would carve scary faces on turnips, beets and potatoes and place them in windows to frighten wandering evil spirits on Halloween.
When they immigrated to America, they started carving pumpkins (a fruit native to America) and found they were much better suited for Jack o Lanterns.
Jack-o'-lanterns originally were hollowed out turnips or rutabaga, not pumpkins.
Pumpkins are used to carve jack-o-lanterns.
turnip was used
Actually jack-o-lanterns can be made out of any fruit or vegetable; it's just that pumpkins are large, and easy to hollow out and carve faces on.(It is believed that the first jack-o lanterns were made from turnips)
Pumpkins
65% of pumpkins are used by people to make Jack-O-Laterns.
turnips
Pumpkins are often used to create jack-o-lanterns on Halloween.
It is believed that the Jack o' Lantern originated in Ireland. The first Jack o' Lanterns were not pumpkins but beets, turnips and mangelwurzel. They were carved into grotesque faces when Samhain was celebrated. Pumpkins as Jack o' Lanterns were first used in America beginning in 1834.
It's a tradition to carve pumpkins on Halloween, when the pumpkins are carved they are called jack-o-lanterns.