 Bonnie Blackburn and Leofranc Holford-Strevens suggest that this was a Christianized version of the Roman annual feast of the Saturnalia (when even slaves played "masters" for a day).In some regions, such as medieval England and France, it was said to be an unlucky day, when no new project should be started.There was a medieval custom of refraining where possible from work on the day of the week on which the feast of "Innocents Day" had fallen for the whole of the following year until the next Innocents Day.