Have start/end dates and/or effective dates in places such as: change in recurring donation amount; change in sponsorship support amount; custom donation form active timeframe; future cancel date for stopping a donation and/or sponsorship; 'Mark as current' have option to choose all or portion of amount with associated effective date; timestamp and/or date field associated with Graduated Status on Sponsorship and similarly Add an Active/Inactive status option with to Supporter profile.