DIY: Cheap Perpetual Calendar

Another project from the evil mad scientist (he's the one that first gave us the bristle bot).  This one involves a binary perpetual calendar.

Here's a review of binary math, if you haven't practiced counting by 1 and 0's lately.

0 - 10, However I guess we need to count to 31 at least for the calendar.

Binary	Decimal
0	0
1	1
10	2
11	3
100	4
101	5
110	6
111	7
1000	8
1001	9
1010	10