The Nintendo Countdown Calendar is a DSiWare application released on September 20, 2010 in North America, and on November 19, 2010 in Europe. It is also on the Nintendo eShop. The Nintendo Countdown calendar is 200 Nintendo Points, and $1.99USD (United States Dollars) on the eShop.
The Nintendo Countdown Calendar is a calendar where the user can actually write events with the Stylus on different days, use icons to show what the event is (a present for a birthday, a beach for a vacation, etc.), describe what type of event it is (Birthday, Plans, Anniversary, etc.), and after they do that, the event will be placed on the calendar, and the days until the event will be shown. The calendar also suggests events (ex: Apple Season), and tells about them. The user may also (if they wish) tell the calendar they birthday, and it will be added to the calendar.