A jack-o'-lantern is the symbol of which holiday?

A jack-o'-lantern (or jack o'lantern) is a carved turnip, pumpkin or other root vegetable lantern, commonly associated with the Halloween holiday. Its name comes from the reported phenomenon of strange lights flickering over peat bogs, called "will-o'-the-wisps" or "jack-o'-lanterns". The name is also tied to the Irish legend of Stingy Jack, a drunkard who bargains with Satan and is doomed to roam the Earth with only a hollowed turnip to light his way.

Jack-o'-lanterns carved from pumpkins are a yearly Halloween tradition that developed in the United States when Irish immigrants brought their root vegetable carving tradition with them.

In a jack-o'-lantern, the top of the pumpkin or turnip is cut off to form a lid, the inside flesh is scooped out, and an image—usually a scary or funny face—is carved out of the rind to expose the hollow interior. To create the lantern effect, a light source, traditionally a flame such as a candle or tealight, is placed within before the lid is closed.