This is the 7267th most frequent German word.
geburtstagsfeiern
"Geburtstagsfeiern" means "birthday celebrations" in English.
Here, 'Geburtstagsfeier' is used as a noun to describe the event of celebrating someone's birthday.
Ich plane, nächstes Wochenende eine große Geburtstagsfeier zu organisieren.
I am planning to organize a big birthday party next weekend.
In this context, 'Geburtstagsfeier' is used as a location or scenario indicating the ongoing or completed celebration of someone's birthday.
Wir hatten viel Spaß bei der Geburtstagsfeier meiner besten Freundin.
We had a lot of fun at my best friend's birthday party.
Here, 'Geburtstagsfeiern' is used as a verb (in gerund form) to describe the act or process of celebrating birthdays in general.