It was simply stat based. Trditionally the 4 months with the highest number of closed sales are March through June. So yes part of it is most likely based on the school year calendar. Part of it may also be because that is when the most inventory or perhaps the best quality of inventory is available. So if you factor in market time and the escrow period, getting the home on the market in February would fall into getting a closing in that timeframe. However…. past performance doesn’t gaurantee future outomes. Also seasonal patterns are easily disrupted by greater events like we saw in 2007-2009 on the slow side and in 2012 – spring of 2013 on the fast side. In both those cases the inventories were skewed. So in a normalized market without substantial external forces seasonal patterns in the past showed statistical higher closings in certain months. As for why? Points like you made have merit. Also conclusion of the holidays, and the end of the previous tax year may have a little influence.