import { subQuarters } from "https://deno.land/x/date_fns@v2.5.1/index.js";
Examples
// Subtract 3 quarters from 1 September 2014:
var result = subQuarters(new Date(2014, 8, 1), 3)
//=> Sun Dec 01 2013 00:00:00
// Subtract 3 quarters from 1 September 2014: var result = subQuarters(new Date(2014, 8, 1), 3) //=> Sun Dec 01 2013 00:00:00