import { lastDayOfYear } from "https://deno.land/x/date_fns@v2.5.1/index.js";
Examples
// The last day of a year for 2 September 2014 11:55:00:
var result = lastDayOfYear(new Date(2014, 8, 2, 11, 55, 00))
//=> Wed Dec 31 2014 00:00:00
// The last day of a year for 2 September 2014 11:55:00: var result = lastDayOfYear(new Date(2014, 8, 2, 11, 55, 00)) //=> Wed Dec 31 2014 00:00:00