Rather than making a bigger picture point out of a single example, I'm thinking;

In the US, dependent on location, a person may be living under several different governments.

Governments recognize and/or create holidays, and holidays can go on to be cultural events.

Governments organize and finance festivals and events, which can and do become culture of a place or people.

They built statues, museums, parks, libraries, theatres, etc; all with several different levels and layers of culture.

You'd need to start defining parameters of what is a government, what is a culture shift, etc.