FRENCH	ENGLISH
le lendemain et le jour suivant	the next/following day
le lendemain is casual and le jour suivant is formal.
Le lendemain, elle est partie.	The next day, she left.
Le lendemain, il avait disparu.	The next day, he was gone.
J’ai rendu la clé le lendemain.	I returned the key the next day.
Le jour suivant, nous avons repris le travail.	The next day, we resumed work.
avant midi le jour suivant	before noon the following day
Le jour suivant, je me sentais mieux.	The next day, I was feeling better.
prochain / prochaine	next
"Prochain" is placed before the noun to emphasize the immediate sequence or proximity in time. When "prochain" is placed after the noun, it indicates a more general future reference or a time further ahead.
le prochain train	the next train
le prochain fois	the next time
pendant notre prochain congé /kɔ̃ʒe/	during our next holiday
À la semaine prochaine.	See you next week.
À mardi prochain.	See you next Tuesday.
La rentrée prochaine /ʀɑ̃tʀe/	the next school year
l'an prochain et l'année prochaine	the next year
L'an prochain is more formal and specifies a unit of time or a specific point in time. L'année prochaine is more conversational and common. It is used to emphasize the concept of a whole year rather than just the idea of "next year" as a time marker.
Le concert est prévu l’an prochain au stade. /pʀevy/ /stad/	The concert is planned next year at the stadium.
notre réunion de famille l'an prochain	our family reunion next year
On va visiter Paris l’an prochain.	We are going to visit Paris next year.
Je commence déjà à penser à l'année prochaine.	I’m already starting to think about next year.
L’année prochaine sera pleine de surprises.	Next year will be full of surprises.
Je vais étudier une langue l’année prochaine.	I'm going to study a foreign language next year.
an and matin refer to a specific unit of time or point in time. année and matinée refer to a duration or the events happening throughout the year/morning.
L’an dernier, j’ai voyagé en Europe.	Last year, I travelled to Europe.
L’année dernière a été difficile.	Last year was difficult.
Je me lève tôt le matin.	I get up early in the morning.
Il est parti tôt ce matin.	He left early this morning.
J’ai passé la matinée à nettoyer la maison. /netwaje/	I spent the whole morning cleaning the house.
Il a travaillé toute la matinée.	He worked all morning.