subBusinessDays
import { subBusinessDays } from "https://esm.sh/v135/date-fns@3.6.0/index.d.mts";
@example
// Substract 10 business days from 1 September 2014:
const result = subBusinessDays(new Date(2014, 8, 1), 10)
//=> Mon Aug 18 2014 00:00:00 (skipped weekend days)
function subBusinessDays<DateType extends Date>(date: DateType | number | string, amount: number): DateType;