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
Four-day week of work on Fridays. In 2016, a IT company in Romania, declared Monday as a day-off. As a result of reducing with 20% of working time, Friday has become much more productive. The employees said that three days off actually means 50% more free time then before. In New Zealand, trust company Perpetual Guardian announced in February 2018 that it would begin trialing a four-day work week in March 2018. Unlike many four-day week initiatives which require staff to work longer days for the same pay, or receive less pay, Perpetual Guardian’s plan, instigated by founder Andrew Barnes, saw the