Christopher Robin presents Winnie-the-Pooh with an interesting new gift—a calendar. Pooh has never seen one before, and Christopher Robin explains that it is a way of keeping track of the days, weeks, months and seasons. The calendar stops at each season, as we watch Pooh, Piglet, Eeyore, Rabbit and Owl in the Hundred Acre Wood exploring the world around them and noticing the changes. Among them: the water in the pond becomes hard and slick when it gets cold in the winter and becomes refreshing and fun to swim in when it gets warm in the summer.