WEEKNUM(A1; 2) returns 10 when A1 is "9th of March 2008". Number of the week in the year, with a week beginning on Monday (2)
WEEKNUM( A1; 2) jout 10 as A1 "09 maart 2008" befettet. wikenûmer yn it jier, mei de wike begjinnend op moandei (10)