Where does “Jour J” come from?

Jour J (French) comes from French jour, from Middle French jour, from Old French jor, from Latin diurnum, from Latin diurnus, from Latin diēs, from Proto-Italic djēm, from Proto-Italic *djous — to be bright; sky, heaven.

Jour J (French): D-Day WWII

Definitions

  1. D-Day WWII

Ancestry of “Jour J”, step by step

Jour J traces back through two separate lines of ancestry.

via French jour

StepLanguageWordMeaning
1Frenchjourday; daylight, light; opening, aperture
2Middle Frenchjourdaylight
3Old Frenchjorday
4Latindiurnummasculine accusative singular of diurnus; neuter...
5Latindiurnusof the day; daily; day
6LatindiēsA day, particularly
7Proto-Italicdjēmaccusative singular of *djous
8Proto-Italic*djous
9Proto-Indo-Europeandyḗwssky, heaven; sky god
10Proto-Indo-Europeandyéwssky, heaven
11Proto-Indo-Europeandyew-to be bright; sky, heaven

via English D-Day

StepLanguageWordMeaning
1EnglishD-DayThe date of any major event planned for the...
2EnglishDThe ordinal number fourth, derived from this...
3EnglishdirhamA unit of currency used in the Arab world,...
4Arabicدِرْهَم
5Middle Persian𐭦𐭥𐭦𐭭drachm
6Ancient Greekδραχμήdrachma; drachm
7Ancient Greekδράσσομαιto grasp, take handfuls; I hold, seize; to hold,...
8Proto-Indo-Europeandreǵʰ-to be unwilling, vexed
Every word from Proto-Indo-European dyew-Every word from Proto-Indo-European dyéwsEvery word from Proto-Indo-European dyḗws