This is the 15410th most frequent Russian word.
празднике
"Празднике" is the prepositional case of "праздник," meaning "holiday" or "celebration" in English.
Here, 'празднике' is used to refer to the topic of discussion, indicating what the conversation was about.
Мы разговаривали о празднике вчера.
We talked about the celebration yesterday.
In this case, 'празднике' refers to the event for which preparations were being made, highlighting a future event.
Они готовятся к празднику долгие недели.
They have been preparing for the celebration for weeks.
The word 'празднике' indicates the location of the event, showing where the action took place.