differenceInCalendarISOWeekYears
import { differenceInCalendarISOWeekYears } from "https://esm.sh/v135/date-fns@3.6.0/index.d.mts";@example
// How many calendar ISO week-numbering years are 1 January 2010 and 1 January 2012?
const result = differenceInCalendarISOWeekYears(
new Date(2012, 0, 1),
new Date(2010, 0, 1)
)
//=> 2
function differenceInCalendarISOWeekYears<DateType extends Date>(dateLeft: DateType | number | string, dateRight: DateType | number | string): number;