mkdayno calculates the number n of the day d,m formula from: Jean Meeus "Astronomische Berechnungen" 2., durchges. Auflage Joh. Ambrosius Barth, Leipzig, Berlin, Heidleberg, 1994 call: n=mkdayno(d,m,yr); d: day, e.g. the 24 in the date of Xmas m: month, e.g. the 12 in the date of Xmas yr: year result: a number from 1 to 365 (366 in leap years) see also MKDATEBYNO M. Knapmeyer 29.05.1995