Aging a finished cigar is different from aging bales of leaf at the factory. The factory has already fermented and rested the tobacco. Aging in your own humidor is a slower process: the moisture in the cigars evens out, harsh flavors fade, and, if the humidity stays stable, the smoke can become smoother. If the humidor is too damp, the cigars can grow mold.
There is no fixed schedule. Some cigars are made to be smoked right away. Some companies, including Padrón, already age the leaf for years before rolling it. Aging those cigars for another year at home is a matter of personal preference, not a correction of the factory’s work.
Keep the relative humidity within the commonly recommended range, allow some air circulation, and do not follow a rigid timetable. See humidors.