Jour, journée, soir, soirée
These word pairs can be problematic, because they are translated in English as one word.
Generally, jour is used for counting
Un jour
Deux jours
Trois jours
Des jours
It’s also used in certain expressions
Bonjour
Le jour de l’An.
New Years’ Day.
To talk about a specific day
Le jour où je t’ai rencontré
The day I met you