Counting the months of 30 days, with 31 days

Counting the months of 30 days, with 31 days with the aid of my hands
 An old way, we learned from grandparents, to calculate the number of days each month is the best known way of making punch our hand and calculating those months fall between the fingers have 30 days while those months fall in bone have 31 days. It becomes a special mention for February.