Captonion: Canada is the worlds largest producer of maple syrup, Quebec actually. Nutrients stored in the maple trees roots are converted into sugars and brought up by the sap in spring when the tree is getting set to produce a new crop of leaves. Clear cold nights and warm sunny days trigger the sap to run. The early season run sap produces the best syrup. As the tree start to produce buds the quality of the sap falls and taints the taste of the sap/syrup. On average it takes 40 gal. of sap make 1 gal of syrup. This is the overly simplified basics.
If your happy with syrup you have made with sap taken in the fall we are all happy for you. The maple trees probably do not share your enthusiasm or the 7000 plus producers in Quebec, plus thousands more in Ontario, New Brunswick, Nova Scotia, Manitoba, and Vermont which the USA's largest producer. With all due respect Sir perhaps you should get hold of these folks and tell them the errors of there ways and how there missing out on a whole fall market.