прошедшего накануне

Is there a difference betwee накануне and прошедшего накануне?
thanks

Yes, the same as between '...on the eve of...' and '... that had taken place on the eve of..."

Накануне праздника все вырядились клоунами - a simple fact about time (like 'yesterday' or date) of the event


На праздник, прошедший накануне рождества все вырядились клоунами - it is an indication that something in the past had taken place on the eve of something (usually, this is reflected with the Past Perfect tense) - something had taken place on the eve of something else.

Thanks!!