I've heard various people say that Boston's rental market turns over on September 1st, but it wasn't until I compared today's apartment map to last months that I really saw the difference:

	8/18	9/18
listings	3368	383
picture	map	map

There are 10x fewer apartments on PadMapper now than there were a month ago. This probably reflects most apartments being on a 9/1-8/31 lease cycle.