I bought a great calendar set from Staples, it came with the weather wheel, etc! It is bright and big and I get the kiddies to help me count and then I use sticky tack on the back of the numbers and have one child come up and put the number on for us.
Some days when it is busy I will do circle with them all sitting at snack and then later in the day we will do our songs and stories.
It is wonderful you are even giving this some thought!! I know a lot that wouldn't!!