Explanation:
Zoo: would be the next year, January 1st.
Art museum: would be basically two years. So January 1st of the next year. The year after the zoo
Children's Museum: would be the next year of July 1st
In order this would go:
Zoo: January 1st
Children's Museum: next July 1st
Art museum: which would be another six months from the children's museum. Which would be January 1st of the next year.