California's centennial celebration was on September 9th, 1950.

The Kansas state centennial celebration took place in 1961.

The centennial of Tennessee's statehood was in 1896.

It is called a "centennial celebration"

I am guessing you are referring to whether California had a centennial celebration. It was adopted into the union on September 9, 1850 making its centennial celebration that same day in 1950. There was a statewide celebration of that day. I do not know specifics about celebrations, but it was following the 1948 and 1949 celebration of the Gold Rush.