Nouns ending in -ée are usually feminine.
The suffix often marks a duration or contents.
Is année masculine or feminine?
l'année
The rule behind it
91.7% of -ée nouns are feminine
In context
Nous sommes allés à Londres l'année dernière.
We went to London last year.
J'ai commencé à naviguer l'année dernière.
I started sailing last year.
J'ai fait sa connaissance l'année dernière.
I got acquainted with him last year.