c. 1200, "a defined course of traveling; one's path in life," from Old French journée "a day's length; day's work or travel" (12c.), from Vulgar Latin *diurnum "day," noun use of neuter of Latin diurnus "of one day" (from dies "day," from PIE root *dyeu- "to shine"). The French fem, suffix -ée, from Latin -ata, was joined to nouns in French to make nouns expressing the quantity contained in the original noun, and thus also relations of times (soirée, matinée, année) or objects produced.
Meaning "act of traveling by land or sea" is c. 1300. In Middle English it also meant "a day" (c. 1400); a day's work (mid-14c.); "distance traveled in one day" (mid-13c.), and as recently as Johnson (1755) the primary sense was still "the travel of a day." From the Vulgar Latin word also come Spanish jornada, Italian giornata.
from French plat du jour "dish of the day," which appeared from early 20c. on restaurant menus; abstracted as an all-purpose modifier by 1989. For jour "day" see journey (n.).
"afternoon performance, an entertainment held in the daytime," 1848, from French matinée (musicale), from matinée "morning" (with a sense here of "daytime"), from matin "morning" (but here "afternoon" or "daytime"), from Old French matines (see matins). Originally as a French word in English; it lost its foreignness by late 19c. For the French suffix, compare journey.
Proto-Indo-European root meaning "to shine," in derivatives "sky, heaven, god."
It forms all or part of: adieu; adios; adjourn; Asmodeus; circadian; deific; deify; deism; deity; deodand; deus ex machina; deva; dial; diary; Diana; Dianthus; diet (n.2) "assembly;" Dioscuri; Dis; dismal; diurnal; diva; Dives; divine; joss; journal; journalist; journey; Jove; jovial; Julia; Julius; July; Jupiter; meridian; Midi; per diem; psychedelic; quotidian; sojourn; Tuesday; Zeus.
It is the hypothetical source of/evidence for its existence is provided by: Sanskrit deva "god" (literally "shining one"); diva "by day;" Avestan dava- "spirit, demon;" Greek delos "clear;" Latin dies "day," deus "god;" Welsh diw, Breton deiz "day;" Armenian tiw "day;" Lithuanian dievas "god," diena "day;" Old Church Slavonic dini, Polish dzień, Russian den "day;" Old Norse tivar "gods;" Old English Tig, genitive Tiwes, name of a god.