First off, I think reporting a date difference using months as one of the units of time is a terrible idea. Why? Because the number of days involved depends on the start date... a well-fixed unit of measure should not vary at all if it is to have any meaning. With that said, why do you think 1 Month 3 Days is wrong? From February 28th to March 28th is one month (you use the start date's month to count from), then March 29th, 30th and 31st is another 3 days. What were you expecting the answer to be?