Migrating from luxon-business-days

The translations below are checked against the real luxon-business-days in test/luxon-business-days.test.ts.

Unless you configure other holidays, luxon-business-days skips seven US shipping holidays. These rules give the same holidays, which the tests check for every day from 1900 to 2200:

import { DateTime } from 'luxon-business-days';
import { addWorkdays, createWorkCalendar } from 'temporal-workdays';

const shippingHolidays = [
  '01-01',
  { easter: 0 },
  { month: 5, dayOfWeek: 1, week: -1 }, // Memorial Day
  '07-04',
  { month: 9, dayOfWeek: 1, week: 1 }, // Labor Day
  { month: 11, dayOfWeek: 4, week: 4 }, // Thanksgiving
  '12-25',
];
const calendar = createWorkCalendar({ holidays: shippingHolidays });

DateTime.fromISO('2026-11-25').plusBusiness({ days: 1 }).toISODate(); // → '2026-11-27'
calendar.addWorkdays(Temporal.PlainDate.from('2026-11-25'), 1).toString(); // → '2026-11-27'

luxon-business-days	temporal-workdays
dt.setupBusiness({ businessDays, holidayMatchers }), which is global	createWorkCalendar({ weekend, holidays }), with no global state
businessDays: [1, 2, 3, 4, 5]	weekend: [6, 7], the other days. Both number Monday as 1.
dt.plusBusiness({ days: n }), dt.minusBusiness(…)	addWorkdays(d, n), subtractWorkdays(d, n)
dt.isBusinessDay()	!isWeekend(d), because it checks only the weekday and not holidays
dt.isBusinessDay() && !dt.isHoliday()	isWorkday(d)
dt.isHoliday()	isHoliday(d)
availableHolidayMatchers.isMLKDay, isColumbusDay and the others	rules such as { month: 1, dayOfWeek: 1, week: 3 } and { month: 10, dayOfWeek: 1, week: 2 }
a custom holiday matcher (dt) => boolean	holidays: (date) => boolean, which receives a Temporal.PlainDate
no equivalent	workdaysBetween, workdaysInMonth, working hours, observed holidays