differenceInCalendarMonths
import { differenceInCalendarMonths } from "https://esm.sh/v135/date-fns@3.6.0/index.d.mts";
@example
// How many calendar months are between 31 January 2014 and 1 September 2014?
const result = differenceInCalendarMonths(
new Date(2014, 8, 1),
new Date(2014, 0, 31)
)
//=> 8
function differenceInCalendarMonths<DateType extends Date>(dateLeft: DateType | number | string, dateRight: DateType | number | string): number;