isSaturday
import { isSaturday } from "https://esm.sh/v135/date-fns@3.6.0/index.d.mts";@example
// Is 27 September 2014 Saturday?
const result = isSaturday(new Date(2014, 8, 27))
//=> true
function isSaturday<DateType extends Date>(date: DateType | number | string): boolean;