hanging date
n.— «Today is April 23/30 on your calendar. In printing parlance this is called a hanging date, which does not have anything to do with capital punishment. It happens when a month starts on a Friday or Saturday and rolls over into a sixth week. Apparantly it’s acceptable to use a hanging date on only a Sunday or Monday.» —“Slash Day” by John Deeth John Deeth Blog (Iowa City, Iowa) Apr. 30, 2007. (source: Double-Tongued Dictionary)