Here is an attempt to find my best snapshot per month for 2015.
January 2015
February 2015
March 2015
April 2015
May 2015
June 2015
July 2015
August 2015
September 2015
October 2015
November 2015
December 2015
The method:
I quickly scanned through my photos on a per month basis and selected a photo based on number of views or memories or both.
History:
See past summaries for 2014 and 2013 and 2012 and 2010.