import { subISOWeekYears } from "https://deno.land/x/date_fns@v2.0.0-beta.2/index.js";
Examples
// Subtract 5 ISO week-numbering years from 1 September 2014:
var result = subISOWeekYears(new Date(2014, 8, 1), 5)
//=> Mon Aug 31 2009 00:00:00
// Subtract 5 ISO week-numbering years from 1 September 2014: var result = subISOWeekYears(new Date(2014, 8, 1), 5) //=> Mon Aug 31 2009 00:00:00