import { subYears } from "https://deno.land/x/date_fns@v2.0.0-alpha.34/index.js";
Examples
// Subtract 5 years from 1 September 2014:
var result = subYears(new Date(2014, 8, 1), 5)
//=> Tue Sep 01 2009 00:00:00
// Subtract 5 years from 1 September 2014: var result = subYears(new Date(2014, 8, 1), 5) //=> Tue Sep 01 2009 00:00:00