A paper in the open access journal PLOS ONE, published October 2017, addresses the timescale by which daily life events are incorporated into dreams. The majority of these incorporations are from the days before the dream, and, as noted by Freud, mundane and apparently unimportant memories from the day before the dream are also incorporated. To read the paper, click here http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0185262
Authors are Raphael Vallat, Benoit Chatard, Mark Blagrove and Perrine Ruby.