This is the 16243rd most frequent Polish word.
uroczystego
"Uroczystego" means "solemn" or "festive" in English, depending on context.
"Uroczystego" is used here as an adjective to describe the type of dinner, indicating its formal and celebratory nature.
Przygotowaliśmy salę na przyjęcie uroczystego obiadu.
We prepared the hall for a ceremonial dinner.
"Uroczystego" functions as an adjective, qualifying the concert as formal or significant within a specific occasion.
Wszyscy czekali na rozpoczęcie uroczystego koncertu.
Everyone was waiting for the commencement of the ceremonial concert.
"Uroczystego" modifies the noun "świętowania," signifying that the celebration was conducted in a formal and dignified manner.