Bay Shore keeps two calendars: the green one that runs from the first warm week to the last leaf, and the white one that can arrive any night between December and March. P.J.R Landscaping & Tree Service Corp works both — grass cutting, trimming, edging and cleanups on the one, plowing, hand-clearing and ice control on the other. Along the storefront blocks and the side streets that run down toward the water, the standard holds either way: a clear border and nothing left lying in the walkway. Nor'easters here drop wet, heavy snow and leave a crust behind; an August lawn puts on an inch every three days. Neither one waits, so neither one gets to.