isWeekend
import { isWeekend } from "https://esm.sh/v135/date-fns@3.6.0/index.d.mts";@example
// Does 5 October 2014 fall on a weekend?
const result = isWeekend(new Date(2014, 9, 5))
//=> true
function isWeekend<DateType extends Date>(date: DateType | number | string): boolean;