Day

A surname originating as a patronymic derived from a medieval diminutive of David.

An English surname originating as an occupation from day as a word for a "day-servant", an archaic term for a day-laborer, or from given names such as Dagr, Daug, Dege, and Dey, cognate with Scandinavian Dag.

A surname from Irish can be found as both Day and O'Day from Ó Deághaidh (“descendant of a person named Good Luck”).

An unincorporated community in Modoc County, California.

A census-designated place and unincorporated community in Lafayette County, Florida.

A township in Montcalm County, Michigan.

An unincorporated community in Isanti County, Minnesota.

An unincorporated community in Taney County, Missouri.

A town in Saratoga County, New York.

A town in Marathon County, Wisconsin.