Irondequoit Creek runs its wooded ravine through Pittsford, and the sugar maples above it set the calendar — green in May, gold in October, bare and dusted by Thanksgiving. Cassara Lawn & Landscape Management INC follows that calendar all the way around: mowing, trimming and edging through the warm months, then spring and fall cleanups, then the leaves, then blades and shovels and salt once the ground goes hard. A yard kept up all summer and a driveway opened before dawn are the same idea, twice a year. Suburban lots and larger grounds alike, the aim is a property that looks intended rather than merely maintained. That is a full year's work in one town.