import { addQuarters } from "https://deno.land/x/date_fns@v2.12.0/index.js";
Examples
// Add 1 quarter to 1 September 2014:
var result = addQuarters(new Date(2014, 8, 1), 1)
//=> Mon Dec 01 2014 00:00:00
// Add 1 quarter to 1 September 2014: var result = addQuarters(new Date(2014, 8, 1), 1) //=> Mon Dec 01 2014 00:00:00