City Day is celebrated in St. Petersburg on May 27. On this day, a flower-laying ceremony is usually held at the monument to the founder of the city.
There is a tradition of washing monuments before the holidays in other cities as well. For example, in Helsinki, students wash the Havis Amanda statue every year before May 1st.
Washing Havis Amanda is a kind of privilege that goes to students of different universities. Washing the horse of Peter the Great is not yet a privilege to be earned. But even from this work, one could arrange a kind of attraction for tourists.