Modifying existing Calendar user-form

Actually, i have to make a plan sheet quiet frequently; in which i have to fill up Start Date in column A & End date in column B, for every task. Currently, i am making a Plan sheet (29 august to 26 september) & with the current calendar form; i have to select the month (september) every time; which is a bit hectic but its still a lot helpful rather than filling up all dates manually :P ... But if 2 months calendar would be available; it will be a treat ..:-)

Thanks