With a large service book, we need to at times, and at least annually make changes to the price book. Ideally we should be able to set a date and time as to when the price change will be activated. This means we can work on any significant changes, then announcement ahead of time to guests. Then the prices all go live. Eg. Jan 1st changes for the new year. We can build the changes out now to go live Jan 1st.