Why is jeudi called jeudi in french?

Answer 1

Jeudi (Thursday in English) comes from the other names of the days of the week, from Latin where it was spelled 'Jovis dies' (the day of Jupiter). Evolution of the name from vulgar Latin to old French altered the spelling to 'jeudi'.

Answer 2

"Jeudi" in French is derived from the Latin word "Jovis dies," which means "day of Jupiter." Jupiter was the Roman god of the sky and thunder, equivalent to the Greek god Zeus. The day Thursday was named in honor of Jupiter.