MONTHS("2002-01-19 ";" 2002-02-26 "; 1) returns 0, because there is not a whole month in between, starting at the first day of the month
MONTHS ("2006- 01- 19"; "2006- 02- 26"; 1) geeft 0, omdat der gjin hiele moanne tusken dizze datums sit, rekkene fan de earste dei fan de moanne ôf.