A calendar is provided for behavior modification as well as a method for using the same. The calendar has calendar sheets and informational sheets. The calendar has objectives sections, data collection sections, analysis sections, non-date pages and/or detachable pages for use by an individual. The calendar may be customized and/or pre-designed for an individual or by the individual. In use, the behavior information may be recorded on the calendar sheet. Information associated with daily, weekly, and/or monthly behavior may be recorded. The information may include weekly and/or monthly averages and/or summations, delta calculations, and/or minimum/maximum data. The calendar may be adapted to measure or track indicators, such as, for example, developmental progress, caloric intake, amount and type of exercise, amount of fat, sodium or sugar, amount of cigarettes smoked, blood pressure measurements, weight gain or the like. A bottom space may also be provided to record monthly goals and/or objectives.