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
German Unity Day population because of discontent for increased working hours would be seen as a provocation and devaluing the national holiday. In addition, fixing the Unity Day on the first Sunday of October would have meant that it would sometimes fall on 7 October, which happens to have been the national day of East Germany; this date would thus have been seen as commemorating the division of Germany rather than the reunification. The idea was dropped after a short but angry debate. The Day of German Unity is celebrated each year with a ceremonial act and a citizens' festival (""). The celebrations