An Indian Summer refers to a period of unseasonably warm, dry, and calm weather that occurs in late autumn (typically mid-October to late November in the Northern Hemisphere), after the first killing frost or a significant cold snap.
In 19th-century American English, "Indian" could prefix something spurious or imitation (e.g., "Indian corn" for maize, not wheat). "Indian Summer" would then mean a "fake summer." This is plausible but not definitive. indian summer'
Some suggest it refers to "Indian giver"—a racist term for someone who gives a gift and takes it back. Here, summer "gives" warm days, then "takes them back" with returning cold. Most scholars reject this as a later, folk-etymology rationalization. An Indian Summer refers to a period of