Packages folder

/** The nth business day of a month, skipping weekends. */
export function businessDay(year: number, month: number, n: number): Date {
  const day = new Date(Date.UTC(year, month, 1))
  let count = 0
  while (true) {
    const weekday = day.getUTCDay()
    if (weekday !== 0 && weekday !== 6 && ++count === n) return day
    day.setUTCDate(day.getUTCDate() + 1)
  }
}