import { addYears } from "https://deno.land/x/date_fns@v2.5.1/index.js";
Examples
// Add 5 years to 1 September 2014:
var result = addYears(new Date(2014, 8, 1), 5)
//=> Sun Sep 01 2019 00:00:00
// Add 5 years to 1 September 2014: var result = addYears(new Date(2014, 8, 1), 5) //=> Sun Sep 01 2019 00:00:00