The total number of days in a month can be calculated by using your hand knuckles as a calendar. It has another name called Knuckle Rule for Months. Knuckles can be used to remember how many days in each month. Take your left hand and close all the figures. The hilly area is called knuckle and groove area called valley. Every month that lands on knuckles represent 31 days. Similarly, every month that lands on valley represent 30 days, except February. Counting has to start from the left side shown in this 'Use Your Knuckles as Calendar' video. Thanks for watching it. #KnuckleRule #Knuckle #UseYourKnuckle #Calendar #KnuckleForRememberingMonth