I renew my contract annually and any time I want to make a change that is when I do it. I did change my opening hours from 7am to 7:30am last year, but it was because the families who needed 7am left and it gave me an opportunity to make the change. However, I have always insisted on a maximum 9 hour day with a late/early fee too. I always send out a letter about 2 months before my contract renews to tell my daycare families the major changes that are coming up in the renewal contract.