The Crow Moon. Northern tribes called it that because the cawing of the crows was a signal of the end of winter.
The Sap Moon. It's around March that the trees start to run with sap, letting people know that it's Sugaring Time.
And the Crust Moon. March is the time of year when it can be too warm during the day for the snow to stay frozen, but too cold at night for it to keep melting, so the ground is covered with thin crusty ice.