Inspired by the 12-21-12 thread here is some info on Anishinaabe calendar and prophecies. First the calendar:

The Anishinaabe calendar is 13 moons. As you can see, they can change according to the seasons. Winter happens earlier the farther north you go.

Manidoo-giizis Spirit Moon
Namebini-giizis Sucker fish moon
Makoonsag-gaa-nitaawaadi-giizis When the bear cubs are born moon
Ziinsibaakwadooke-giizis Making sugar time moon
Omakakiiwi-giizis Frog moon
Waabigoni-giizis Flowering moon
Ode-imini-giizis Strawberry moon
Miini-giizis Blueberry moon
Manoominikie-giizis Ricing moon
Waatebagaa-giizis Leaves changing moon
Waatebagaa-giizis Falling leaves moon
Adikomemi-giizis Whitefish moon
Gichi-bibooni-giizis Big winter moon

As you can see there is a seasonal representation rather than a strict astrological one. Most are named after the most important food gathering activity of the month. The calendar runs yearly with no particular year date.

Thirteen moons on a turtle's back -- If you examine the segments on the back of every turtle you will see thirteen large segments which represent the thirteen moons of the lunar year. By counting the smaller segments around the lower edge of the shell, you will find there are 28, which represents the 28 days between new moons.

The turtle, of course, is the basis of our land.

Next the Anishinaabe prophecies.