I have been watching Canadian Geese flying in their Migration V for the last week or two every evening around 8pm. I thought they usually started in Sept-October range.
Geese are the late migrators, normally only pushed out when the water freezes and snow covers their food up north. May get a few early migrators in october if there is high hunting pressure here in the states, but the major push of canada birds will normally be December. Through years of hunting them I many times see them fly in the v pattern when going out and feeding. They are just now starting to get into a pattern to head out and feed every evening.