Class Calendar

Calendars are required when working with functions that require knowledge of weekends and holidays (e.g. addBusinessDays).

There is a tutorial here.

Two calendar classes are defined: WeekendCalendar and HolidayCalendar. The object calWeekends is the default calendar. It simply defines Saturday and Sunday as holiday dates.

This is how the WeekendCalendar is defined.

import { Calendar, Timezone } from '@jetblack/date'

export class WeekendCalendar extends Calendar {
  #weekends: number[]

  constructor(name: string = 'WeekendCalendar', weekends: number[] = [0, 6]) {
    super(name)
    this.#weekends = weekends
  }

  isWeekend(date: Date, tz: Timezone): boolean {
    const dayOfWeek = tz.weekday(date)
    return this.#weekends.some(x => x === dayOfWeek)
  }

  isHoliday(date: Date, tz: Timezone): boolean {
    return this.isWeekend(date)
  }
}