function defaultimport { default } from "https://deno.land/x/date_fns@v2.6.0/isFirstDayOfMonth/index.js"; default(dirtyDate)Examples// Is 1 September 2014 the first day of a month? var result = isFirstDayOfMonth(new Date(2014, 8, 1)) //=> true ParametersdirtyDate the date to check