Any day is good :) South America u will see TAM, LAN if im not wrong they have something every day, Caribbean also... I think everyday... u can expect arrivals of El Al, Al Italia, Latehansa, KLM, Aeroflot, LOT, Mexicana, Speedbirds, Shamrocks, Virgin, Emirates and some more... this is regular traffic I would say Locals: too many BlueJets, Delta, Eagle, AA (if u lucky u will see some specials like One world, Habitat for Humanity, Delta B777 etc) ... probably around 4pm u can expect A380 Air France if will be still in service in March ( u never know :))
About the spots... Spot "A" called HoBe (Howard Beach) is good for departures 31L my day almost always starts from HoBe early in the morning whenever sun is waking up :) but this is not the rule... u better have scanner and be sure what is going on if you don't have a scanner you can always call ATIS # 718 995 8188 of course u can use your cell phone.... u will get all information anytime u need to know or check.... after u shot some goodies from HoBe you can move to wherever arrivals are... most of the time it will be spot "C" called Firestone... park your car right next to the "sign" with store names this is NYCA members spot :)) if this is your lucky day u'll see some freaks :) specially on weekends... BUT... as far I know 31L will be closed in March so forget about spots: A, C, E, G.... but no worries probably 4's are gonna be in heavy use in March and if arrivals are on 4's then you should go and see in my opinion the greatest place in NY :) Bayswater spot "D" I love pictures of planes lining up on the runway 4L and my favorite combination is arrivals 4R and departures 4L.... like I said Im not the person to ask what they will use in march and in what configuration so u better have scanner :) u also can expect The Mounds – Springfield Gardens spot B arrivals 22L and spot "F" Arrival also 22L or departures are good from this spot.... in my opinion in the morning the spot will be Bayswater and after 12-1pm The Mounds but like I said u never know.... if u need I can post GPS cords to each spot u are interesting about
Links u must know:
http://flightaware.com/ u will find detailed schedule of departures and arrivals and u can track every flight ( to see how much time latehansa will be late or AF :)) if u have Iphone or something like that u can track everything on the rout, if not u must use your wife/girlfriend whos at home at the time :) thats what I do :p no u can not use my wife... sorry...
http://www.flightstats.com/ - similar site to posted above....
http://www4.passur.com/jfk.html - ATC Radar - this is another way to see what rwys are in use but like I said scanner or ATIS number are the best ways....
Make sure u have your Passport on you at all the times.... if officer will ask you what are you doing in usa cuz Im sure he will... the correct answer is: Im tourist and Aviation lover :)
u still have lots of time to prepare your trip... Have fun and great weather !! If u need GPS cords let me know, if u have any ?? feel free to ask... Im sure lots of ppl from NYCA will be more than happy to help u...