I hope this will help you schedule the proper amount to time to keep your yard properly mowed.
Other things to consider when scheduling the time needed: Remove all feet not belonging to you (and attached to your legs) from the yard. Fix flat tires, replace belts, earn enough money to pay for gas to drive to the gas station and fill a 2 1/2 gallon gas can when gas is $4.09 a gallon. Collecting sticks and branches and burning them. Calling the fire department to put out the grass fire started by the burn pile.