(documentationMonthFnEnglishLanguage "A BinaryFunction that maps a subclass of Month and a subclass of Year to the class containing the Month corresponding to that Year. For example (MonthFnAugust (YearFn 1912)) is the class containing the eighth Month, i.e. August, of the Year 1912. For another example, (MonthFnAugustYear) is equal to August, the class of all months of August. Note that this function returns a Class as a value. The reason for this is that the related functions, viz. DayFn, HourFn, MinuteFn, and SecondFn, are used to generate both specific TimeIntervals and recurrent intervals, and the only way to do this is to make the domains and ranges of these functions classes rather than individuals.")