Answer:
. A holiday tradition
Step-by-step explanation:
In a nation state , The vast majority of the people have the exact same culture and very much aware of that fact. They use the culture as a basis to arrange their political structure.
Holiday tradition could only occurs if the nation somehow acknowledge the existence of other cultures who live within its territory. Different cultures tend to possess unique characteristics that made the people have their own way to act/behave. This uniqueness is what define a tradition.
Nation state do not have any of this. The way they live their life is most likely determined by their government. If the people in a nation state repeat a certain set of activities during holiday, it will be more appropriate to consider it as a holiday ritual rather than a culture.