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
Determination of the day of the week ISO 8601. The day designated with 7 may also be counted as "0", by applying the arithmetic modulo 7, which calculates the remainder of a number after division by 7. Thus, the number 7 is treated as 0, 8 as 1, 9 as 2, 18 as 4 and so on. If Sunday is counted as day 1, then 7 days later (i.e. day 8) is also a Sunday, and day 18 is the same as day 4, which is a Wednesday since this falls three days after Sunday. The basic approach of nearly all of the methods to calculate the