Syntax
CalendarMonthToWaterMonth(CalendarMonth)
Description
Convert calendar month to water month (will be the same if water year starts in January).
Examples
CalendarMonthToWaterMonth(1) = 1 if water year starts in January
CalendarMonthToWaterMonth(1) = 4 if water year starts in October, because
January is the fourth month in the water year that starts in October (October,
November, December, January)