That Steamboats is just about the best advice, I forgot about that Advent had usually been the general kick off time for the markets, obvious when you think about it.
The nearest we come to Christmas Markets is the ‘Goose Fair’ these are really ancient and go back to the Middle Ages when geese were walked to market for Michaelmas the largest is Nottingham but there are very much smaller ones around England. Although we seem to have borrowed your tradition I’m off to the one in Bath our nearest if we can squeeze in past the tourists!