A 2-ft. x 3-ft. perpetual calendar for tracking reproductive cycles, gives full year of breeding at a glance. Chart has 21 horizontal columns with 21 days in each column, allowing heat cycles to be tracked on a 21-day cycle, making abnormal heat cycles readily apparent. Each box gives a projected calving date for animal bred on that day. Chart is encased in Mylar® which makes it a durable, moistureproof item, usable year after year. Includes four moistureproof colored marking pens, erasable with dry wiping, making it possible to color code different types of information such as medication given, dry-off dates, animals due to freshen, pro-staglandin use, embryo transfer synchronization, etc. Flip side has yearly planner for charting work schedules, planting, harvesting, or any regularly occurring management item. Detailed information included with kit.