Black Friday (1910) restraint and moderation, using no more force than might be necessary, and maintaining under any provocation they might receive, control of temper. The deaths of two suffragettes have been attributed to the treatment they received on Black Friday. Mary Clarke, Emmeline Pankhurst's younger sister, was present at both Black Friday and the demonstration in Downing Street on 22November. After a month in prison for breaking windows in Downing Street, she was released on 23December and died on Christmas Day of a brain haemorrhage, age 48. Emmeline blamed her death on the maltreatment Clarke received at the two November demonstrations; Murray
Common year starting on Friday has only one Friday the 13th; The only Friday the 13th in this common year occurs in August. Leap years starting on Thursday share this characteristic, but also have another one in February. This is the only year type where the "n"th "Doomsday" (this year Sunday) is not in ISO week "n"; it is in ISO week "n"-1. In the (currently used) Gregorian calendar, the fourteen types of year (seven common, seven leap) repeat in a 400-year cycle (20871 weeks). Forty-three common years per cycle or exactly 10.75% start on a Friday. The 28-year sub-cycle does only span across century