For a week interval spanning from say 2016/11/29 to 2016/12/05, is there some pre-packaged functionality in VB.NET for returning the number of days in `month_1` of the interval (== 2) and in `month_2` of the interval (== 5)? For a week falling entirely within a given month, the number of days in `month_1` of the interval would be 7 and in `month_2` of the interval would be 0.