import { getISODay } from "https://deno.land/x/date_fns@v2.5.1/index.js";
Examples
// Which day of the ISO week is 26 February 2012?
var result = getISODay(new Date(2012, 1, 26))
//=> 7
// Which day of the ISO week is 26 February 2012? var result = getISODay(new Date(2012, 1, 26)) //=> 7