This is the 869th most frequent Dutch word.
verjaardag
Birthday.
In this usage, 'verjaardag' denotes the event or celebration associated with someone's date of birth, functioning as the object of the preposition 'naar' (to).
We gaan naar de verjaardag van mijn vader.
We are going to my father's birthday.
Here, 'verjaardag' is used in the context of the specific day itself, acting as part of the temporal prepositional phrase 'op je verjaardag' (on your birthday).
Op je verjaardag mag je een wens doen.
On your birthday, you can make a wish.
Here, 'verjaardag' refers to the annual day which celebrates someone's birth date, indicating possession with 'mijn' (my).