What were you doing last Thursday? The Mass Observation Archive wants to know. Mass Observation is a study into everyday behavior in Britain, and the archive boasts the details of a day in the life of ordinary Briton's from 1937 - 1950s. They are a social research organisation under the care of the University of Sussex.

Mass Observation called for people in the UK to record their day from the moment they woke to when they went to sleep on May 12th, 1937 and continued to do so for subsequent years. Now they’re after the details of how May 12th 2011 was for you. Send yours to to participate in this unique insight into how the UK ticks.