moment-business-days-sk

This is a momentJS plugin that allows you to work with only business days (Monday to Friday) except slovak holidays.

Notes

• This plugin uses momentjs-business-days.
• This plugin sets the slovak locale (sk) format (DD/MM) and official annual slovak holidays.
• 30.10.2018 is one-time exceptional holiday 100. výročie prijatia Deklarácie slovenského národa
• This plugin computes Easter Sunday and adds Good Friday and Easter Monday to holiday
• Computed easter sundays are cached afterwards for later use
• It is possible to add additional, custom annual holidays (for local or district holidays) with slovak format (DD/MM).
• For the documentation see momentjs-business-days and moment.
• Project changelog
• All contributions are welcome.

Install

$ npm install --save moment-business-days-sk

Usage TypeScript

import { Moment } from 'moment';
import moment from 'moment-business-days-sk';

let easterSun = moment().easter(2020) as Moment; // Easter Sunday

let workingThu: Moment = moment(easterSun).prevBusinessDay(); // Thursday
let goodFri: Moment = moment(easterSun).subtract(2, 'd'); // Good Friday
let whiteSat: Moment = moment(easterSun).subtract(1, 'd'); // Easter Monday
let easterMon: Moment = moment(easterSun).add(1, 'd'); // Easter Monday
let workingTue: Moment = moment(easterSun).nextBusinessDay(); // Tuesday

console.log('%s isBusinessDay: %s', workingThu, workingThu.isBusinessDay());
console.log('%s isBusinessDay: %s', goodFri, goodFri.isBusinessDay());
console.log('%s isBusinessDay: %s', whiteSat, whiteSat.isBusinessDay());
console.log('%s isBusinessDay: %s', easterSun, easterSun.isBusinessDay());
console.log('%s isBusinessDay: %s', easterMon, easterMon.isBusinessDay());
console.log('%s isBusinessDay: %s', workingTue, workingTue.isBusinessDay());

Usage JavaScript

var moment = require('moment-business-days-sk');

console.log(moment('2020-10-01').isHoliday()); // false
console.log(moment().easter(2020)); // Moment<2020-04-12T00:00:00+02:00>

Add a custom holiday

var moment = require('moment-business-days-sk');

/*
moment-business-days-sk slovak holidays:
 holidays: [

    // Štátne sviatky
    '01/01', // 1. január – Deň vzniku Slovenskej republiky
    '05/07', // 5. júl – Sviatok svätého Cyrila a Metoda
    '29/08', // 29. august – Výročie Slovenského národného povstania
    '01/09', // 1. september – Deň Ústavy Slovenskej republiky
    '17/11', // 17. november – Deň boja za slobodu a demokraciu

    // Dni pracovného pokoja
    '06/01', // 6. január – Zjavenie Pána (Traja králi)
    '01/05', // 1. máj – Sviatok práce
    '08/05', // 8. máj – Deň víťazstva nad fašizmom
    '15/09', // 15. september – Sedembolestná Panna Mária
    '01/11', // 1. november – Sviatok všetkých svätých
    '24/12', // 24. december – Štedrý deň
    '25/12', // 25. december – Prvý sviatok vianočný
    '26/12', // 26. december – Druhý sviatok vianočný

    // Computed and cached
    // 'Easter Sunday'
    // Computed according to 'Easter Sunday'>
    //   'Good Friday'
    //   'Easter Monday'

    // One time exceptional case:
    '30/10/2018', // 100. výročie prijatia Deklarácie slovenského národa
 ]
*/

Run Tests

npm test

Methods to test slovak business days

isHoliday

moment('2019-01-01').isHoliday(); // true
moment('2019-11-14').isHoliday(); // false

easter

// 21.4.2019 is Easter Sunday
let easter = moment().easter(2019);

easter.month(); // 3 (4-1 = 3)
easter.date(); // 21

// Two days before each Easter is Friday and is holiday
let easterFriday = moment(easter).subtract(2, 'd');
easterFriday.day(); // 5 ... friday
easterFriday.isHoliday(); // true

// Next day after each Easter is Monday
let easterMonday = moment(easter).add(1, 'd');
easterMonday.day(); // 1 ... Monday
easterMonday.isHoliday(); // true

isBusinessDay

// Year 2019 has 250 business days
let foundBusinessDays = 0;

for (let d = 0; d < 365; d++) {
let day = moment('2019-01-01').add(d, 'd');

if (day.isBusinessDay()) {
    foundBusinessDays++;
}

prevBusinessDay, nextBusinessDay

let easter = moment().easter(2019);

let prevBusinessDay = moment(easter).prevBusinessDay();
prevBusinessDay.isHoliday(); // false
prevBusinessDay.day(); // 4 ... Thursday

let nextBusinessDay = moment(easter).nextBusinessDay();
nextBusinessDay.isHoliday(); // false
nextBusinessDay.day(); // 4 ... Tuesday

lastBusinessDayOfThisMonth

let today = moment().startOf('day');

let firstDayOfNextMonth = moment(currDay).add(1, 'month').startOf('month');
let lastBusinessDayOfCurrMonth = moment(firstDayOfNextMonth).prevBusinessDay();
lastBusinessDayOfCurrMonth.isBusinessDay(); // true

Methods from moment-business-days

businessAdd(days)

Will add just business days excluding Saturday and Sunday, return a moment date object:

// 30-01-2015 is Friday, DD-MM-YYYY is the format
moment('30-01-2015', 'DD-MM-YYYY').businessAdd(3)._d; // Wed Feb 04 2015 00:00:00 GMT-0600 (CST)

businessSubtract(days)

Will subtract just business days excluding Saturday and Sunday, return a moment date object:

// 27-01-2015 is Tuesday, DD-MM-YYYY is the format
moment('27-01-2015', 'DD-MM-YYYY').businessSubtract(3)._d; // Thu Jan 22 2015 00:00:00 GMT-0600 (CST)

isBusinessDay()

Check if the date is a business day and return true/false:

// 31-01-2015 is Saturday
moment('31-01-2015', 'DD-MM-YYYY').isBusinessDay(); // false

// 30-01-2015 is Friday
moment('30-01-2015', 'DD-MM-YYYY').isBusinessDay(); // true

nextBusinessDay()

Will retrieve the next business date as moment date object:

//Next busines day of Friday 30-01-2015
moment('30-01-2015', 'DD-MM-YYYY').nextBusinessDay()._d; // Mon Feb 02 2015 00:00:00 GMT-0600 (CST)

//Next busines day of Monday 02-02-2015
moment('02-02-2015', 'DD-MM-YYYY').nextBusinessDay()._d; //Tue Feb 03 2015 00:00:00 GMT-0600 (CST)

prevBusinessDay()

Will retrieve the previous business date as moment date object:

//Previous busines day of Monday 02-02-2015
moment('02-02-2015', 'DD-MM-YYYY').prevBusinessDay()._d; // Fri Jan 30 2015 00:00:00 GMT-0600 (CST)

//Previous busines day of Tuesday 03-02-2015
moment('03-02-2015', 'DD-MM-YYYY').prevBusinessDay()._d; //Mon Feb 02 2015 00:00:00 GMT-0600 (CST)

monthBusinessDays()

Retrieve an array of the business days in the month, each one is a moment object.

//Busines days in month January 2015
moment('01-01-2015', 'DD-MM-YYYY').monthBusinessDays();

/*
[ { _isAMomentObject: true,
    _i: '01-01-2015',
    _f: 'DD-MM-YYYY',
    _isUTC: false,
    _pf:{ ... },
    _locale: { ... },
    _d: Thu Jan 01 2015 00:00:00 GMT-0600 (CST)
  } {
   ...
  },
  ( ... )
]
*/

monthNaturalDays()

Is like monthBusinessDays(), but this method will include the weekends on it's response.

monthBusinessWeeks()

Retrieve an array of arrays, these arrays are the representation of a business weeks and each week (array) have it own business days (Monday to Friday). There could be the case that one week (array) have less than 5 days, this is because the month started on the middle of the week, for example: the first week of January 2015 just have two days, Thursday 1st and Friday 2nd. Each day in the week arrays are moment objects.

//Busines weeks in month January 2015
moment('01-01-2015', 'DD-MM-YYYY').monthBusinessWeeks();

/*
[ [ { _isAMomentObject: true,
      _i: '01-01-2015',
      _f: 'DD-MM-YYYY',
      _isUTC: false,
      _pf: [...],
      _locale: [...],
      _d: Thu Jan 01 2015 00:00:00 GMT-0600 (CST) 
    }, { _isAMomentObject: true,
      _i: '01-01-2015',
      _f: 'DD-MM-YYYY',
      _isUTC: false,
      _pf: [...],
      _locale: [...],
      _d: Fri Jan 02 2015 00:00:00 GMT-0600 (CST) }
  ],
  [...]
]
*/

monthNaturalWeeks()

It's like monthBusinessWeeks(), but this method will include weekends on it's response.

The objects returned by functions are momentjs objects (except isBusinessDay) so you can handle it with moment native functions.

businessDiff()

Calculate number of busines days between dates.

var diff = moment('05-15-2017', 'MM-DD-YYYY').businessDiff(moment('05-08-2017', 'MM-DD-YYYY'));
// diff = 5