Regardless of geographic location, core aeration is ideally timed when turf is healthiest and growing vigorously so that it can withstand the stress of aeration and open holes recover most quickly. Golf facilities in Florida are likely maintaining bermudagrass or seashore paspalum, both warm-season turfgrasses that grow best in summer. For this reason, putting greens in Florida are core aerated during the summer at a time when you have returned to New York. Putting greens in New York are comprised of cool-season turfgrasses, namely creeping bentgrass and Poa annua (annual bluegrass). Cool-season species grow most rapidly in the spring and fall, which is when they are usually core aerated. It is likely that all golf facilities you play are core aerated several times annually, but the peak golf season in New York (and other northern climates) coincides with ideal timing for core aeration. This may not be the case for golf facilities in southern climates where warm-season turfgrasses are aerated in the summer yet peak-season play occurs in the winter.