A calendar indicates the position of the Earthin it's orbit around the Sun.
One complete orbit is one Earth year.
We can also see and track the positions of the other planets, andsee how long it takes them to make one orbit, one year.
Accurately see where the planets are right now. Speed up the solarsystem to see where the planets will be in the future, or go backto see how the planets were aligned on specific dates, like yourbirthday.
Cycle through the planets to get their current year and see thesolar system from a different point of view.