- Step 1: Position hands Ball your hands into fists and hold them front of you.
- Step 2: Begin on the left Count the months on your knuckles and the grooves in between, starting with January on your leftmost knuckle, which is your left pinky.
- Step 3: Count Don't count your thumb's knuckles or any space between your hands. Each of the seven months that land on a knuckle will be months with 31 days. The five months that fall on the grooves all have 30 days.
- Step 4: Remember February Remember the one exception – February – that falls on a groove. It has 28 days, or 29 in a leap year.
- TIP: This trick works just as well using your feet instead of your hands.
- Step 5: Try one hand Try this trick with one hand, too. When you get to the last knuckle, loop around and continue counting on the first knuckle.
- FACT: Julius Caesar, on the advice of the Greek astronomer Sosigenes, invented the leap year in the year 46 B.C.E.
You Will Need
- One or two hands
- One or two feet (optional)