'le jour du souvenir'
that's just a tranlation as celebrations are called by the day they are held (le premier mai, le huit mai, le quatorze juillet, le onze novembre)
There is no unique 'remembrance' day in France. French commemorate the end of WWI on the 11th of November, and the end of WWII on the 8th of May.
Jour de Souvenir
remembrance...just like you spelled it
In remembrance is "en souvenir" in French.
Remembrance day.
Remembrance.
In French, every day is chaque jour.
jour
choose the sign of your day
de ma journée
Jour colombus.
Deschamps