Determination of the day of the week day of the week begins by starting from an ‘anchor date’: a known pair (such as January 1, 1800 as a Wednesday), determining the number of days between the known day and the day that you are trying to determine, and using arithmetic modulo 7 to find a new numerical day of the week. One standard approach is to look up (or calculate, using a known rule) the value of the first day of the week of a given century, look up (or calculate, using a method of congruence) an adjustment for the month, calculate the number of leap years
Kiel Week at the "Spiellinie". Kiel Week is also one of the largest tall ship conventions in Germany, attracting many German and international traditional ships, mainly sailing ships. Many of them spend the week doing day tours out of Kiel, thus berthing much more in view of the festival visitors than the racing boats at Kiel-Schilksee. More than 100 traditional ships and hundreds of yachts usually participate in the Tall Ships Parade ("Windjammer‎parade") on the day before the closing day of the Kiel Week, i.e. usually on the second Saturday of Kiel Week. The Parade was first held in 1972, under the