shahabyazdi/react-date-object

JavaScript library for working with Date and Time in different calendars and locals

Date Object

supported calendars: gregorian , persian , arabic , indian default: gregorian

supported locales: en , fa , ar , hi default: en

NodeJs: date-object

Descriptions

Versions before 2.0.0

The way to entering calendars and locales for the versions before 2.0.0 is different.

To see the readme file for v1.x click here

1- Install

1-1- npm:

npm install react-date-object --save

1-2- yarn:

yarn add react-date-object

2- Usage

import DateObject from "react-date-object";

var date = new DateObject();

console.log(date.format()); //2021/06/10

3- Calendars & Locales

If you want to use a Calendar or a Locale other than Gregorian and English :

Calendars		Gregorian	Persian (Solar Hijri)	Jalali	Arabic (Lunar Hijri)	Indian
		/calendars/gregorian	/calendars/persian	/calendars/jalali	/calendars/arabic	/calendars/indian
Locales	English	/locales/gregorian_en	/locales/persian_en	/locales/persian_en	/locales/arabic_en	/locales/indian_en
	Portuguese - BRAZIL	gregorian_pt_br	-	-	-	-
	Farsi	/locales/gregorian_fa	/locales/persian_fa	/locales/persian_fa	/locales/arabic_fa	/locales/indian_fa
	Arabic	/locales/gregorian_ar	/locales/persian_ar	/locales/persian_ar	/locales/arabic_ar	/locales/indian_ar
	Hindi	/locales/gregorian_hi	/locales/persian_hi	/locales/persian_hi	/locales/arabic_hi	/locales/indian_hi

Examples

3-1- Persian Calendar, Farsi Locale

import DateObject from "react-date-object";
import persian from "react-date-object/calendars/persian";
import persian_fa from "react-date-object/locales/persian_fa";

var date = new DateObject({ calendar: persian, locale: persian_fa });

console.log(date.format()); //۱۴۰۰/۰۳/۲۰

3-2- Arabic Calendar, Arabic Locale

import DateObject from "react-date-object";
import arabic from "react-date-object/calendars/arabic";
import arabic_ar from "react-date-object/locales/arabic_ar";

var date = new DateObject({ calendar: arabic, locale: arabic_ar });

console.log(date.format()); //١٤٤٢/١٠/٢٩

3-3- Indiann Calendar, Hindi Locale

import DateObject from "react-date-object";
import indian from "react-date-object/calendars/indian";
import indian_hi from "react-date-object/locales/indian_hi";

var date = new DateObject({ calendar: indian, locale: indian_hi });

console.log(date.format()); //१९४३/०३/२०

4- Examples

4-1- new instance

4-1-1- String (year month day hour minute second millisecond meridiem)

import DateObject from "react-date-object";

var date = new DateObject("2020 8 21 11 55 36 100 am");

console.log(date.format("YYYY/MM/DD hh:mm:ss.SSS a")); //2020/08/21 11:55:36.100 am

date = new DateObject("2020/08/01");

console.log(date.format("YYYY/MM/DD hh:mm:ss.SSS a")); //2020/08/01 12:00:00.000 am

4-1-2- Number (unix time in milliseconds)

import DateObject from "react-date-object";

var date = new DateObject(1597994736000);

console.log(date.format("dddd DD MMMM @ hh:mm:ss.SSS a")); //Friday 21 August @ 11:55:36.000 am

4-1-3- JavaScript Date

import DateObject from "react-date-object";

var $date = new Date(2019, 8, 20);
var date = new DateObject($date);

console.log(date.format()); //2019/09/20

4-1-4- DateObject

import DateObject from "react-date-object";

var $date = new DateObject("2019/09/20");
var date = new DateObject($date);

console.log(date.format()); //2019/09/20

4-1-5- Object

4-1-5-1-

{
  date: String , Number(unix time in milliseconds), Date or DateObject, //default new Date()
  calendar: Calendar, //default gregorian
  locale: Locale, //default en
  format: String, //default `YYYY/MM/DD`
  ignoreList:Array//If the format contained words that should be ignored
}

import DateObject from "react-date-object";
import persian from "react-date-object/calendars/persian";
import persian_fa from "react-date-object/locales/persian_fa";
import persian_en from "react-date-object/locales/persian_en";

var date = new DateObject({
  date: new Date(),
});

console.log(date.format()); //2020/08/21

date = new DateObject({
  date: new Date(),
  calendar: persian,
  locale: persian_fa,
});

console.log(date.format()); //۱۳۹۹/۰۵/۳۱

date = new DateObject({
  date: "31 Mordad 1399",
  format: "DD MMMM YYYY",
  calendar: persian,
  locale: persian_en,
});

console.log(date.format()); //31 Mordad 1399

4-1-5-2-

{
  year: Number,
  month: Number,
  day: Number,
  hour: Number, //default 0
  minute: Number, //default 0
  second: Number, //default 0
  millisecond: Number, //default 0
  calendar: Calendar, //default gregorian
  locale: Locale, //default en
  format: String, //default `YYYY/MM/DD`
  ignoreList:Array//If the format contained words that should be ignored
}

import DateObject from "react-date-object";
import persian from "react-date-object/calendars/persian";
import persian_en from "react-date-object/locales/persian_en";
import persian_fa from "react-date-object/locales/persian_fa";

var date = new DateObject({
  year: 2020,
  month: 8,
  day: 21,
  hour: 12,
  minute: 20,
  second: 36,
  milisecond: 152,
  format: "dddd DD MMMM YYYY",
});

console.log(date.format()); //Friday 21 August 2020

date = new DateObject({
  year: 1399,
  month: 5,
  day: 31,
  calendar: persian,
  locale: persian_en,
  format: "dddd DD MMMM YYYY",
});

console.log(date.format()); //Jomeh 31 Mordad 1399

date = new DateObject({
  year: 1399,
  month: 5,
  day: 31,
  calendar: persian,
  locale: persian_fa,
  format: "dddd DD MMMM YYYY",
});

console.log(date.format()); //جمعه ۳۱ مرداد ۱۳۹۹

4-2- convert(calendar:Calendar, locale?:Locale)

If you use the convert method without argument, the date will be converted to Gregorian calendar.

The second argument (Locale) is optional.

import DateObject from "react-date-object";
import gregorian from "react-date-object/calendars/gregorian";
import persian from "react-date-object/calendars/persian";
import arabic from "react-date-object/calendars/arabic";
import indian from "react-date-object/calendars/indian";

var date = new DateObject();

console.log(date.format()); //2020/10/31

date.convert(persian);
console.log(date.format()); //1399/08/10

date.convert(arabic);
console.log(date.format()); //1442/03/14

date.convert(indian);
console.log(date.format()); //1942/08/09

date.convert(gregorian); //or date.convert()
console.log(date.format()); //2020/10/31

4-3- format(token:String)

default format is YYYY/MM/DD. to see all format types click here

import DateObject from "react-date-object";

var date = new DateObject();

consoel.log(date.format()); //2020/10/31
consoel.log(date.format("MM/DD/YYYY")); //10/31/2020
consoel.log(date.format("MMM/DD/YYYY HH:mm:ss")); //Oct/31/2020 18:17:28
consoel.log(date.format("dddd DD MMMM YYYY, hh:mm:ss A")); //Saturday 31 October 2020, 06:19:18 PM
consoel.log(date.format("ddd DD MMM YYYY, hh:mm a")); //Sat 31 Oct 2020, 06:20 pm

formatting with ignore list:

import DateObject from "react-date-object";

var date = new DateObject();

console.log(
  date.format("hours:HH minutes:mm seconds:ss", ["hours", "minutes", "seconds"])
); //hours:12 minutes:22 seconds:40

console.log(date.format("it's HH o'clock", ["it's", "o'clock"])); //it's 12 o'clock

console.log(
  date.format(`DD MMMM at hh:mm ${date.hour >= 12 ? "Afternoon" : "Morning"}`, [
    "at",
    "Afternoon",
    "Morning",
  ])
); //11 November at 12:22 Afternoon

4-4- setter methods

import DateObject from "react-date-object";
import gregorian from "react-date-object/calendars/gregorian";
import persian from "react-date-object/calendars/persian";
import indian from "react-date-object/calendars/indian";
import gregorian_en from "react-date-object/locales/gregorian_en";
import persian_en from "react-date-object/locales/persian_en";
import indian_en from "react-date-object/locales/indian_en";

var date = new DateObject();

date
  .setCalendar(gregorian)
  .setFormat("YYYY-MM-DD HH:mm:ss.SSS")
  .setLocale(gregorian_en)
  .setYear(2020)
  .setMonth(9)
  .setDay(21)
  .setHour(12)
  .setMinute(20)
  .setSecond(14)
  .setMillisecond(200);

console.log(date.format()); //2020-09-21 12:20:14.200

date
  .setCalendar(persian)
  .setLocale(persian_en)
  .setYear(1399)
  .setMonth(9)
  .setDay(21)
  .setFormat("dddd DD MMMM YYYY");

console.log(date.format()); //Jom'eh 21 Azar 1399

date.setDate(new Date(2020, 9, 27)).setLocale(gregorian_en); //(calendar is set to gregorian)

console.log(date.format()); //Tuesday 27 October 2020

date.setDate(
  new DateObject({
    calendar: indian,
    locale: indian_en,
    year: 1942,
    month: 8,
    day: 5,
  })
); //format is set based on given DateObject (default:YYYY/MM/DD)

console.log(date.format()); //1942/08/05

4-5- get and set

import DateObject from "react-date-object";

var date = new DateObject();

console.log(date.format()); //2020/08/21

date.year += 2;
date.month += 2;
date.day += 2;
date.hour += 2;
date.minute += 2;
date.second += 2;
date.millisecond += 2;

console.log(date.format()); //2022/10/23

console.log(date.month);

/**
 *  {
 *    name: 'October',
 *    shortName: 'Oct',
 *    length: 31,
 *    index: 9,
 *    number: 10,
 *    toString: [Function (anonymous)]
 *  }
 */

console.log(date.weekDay);

/**
 * {
 *   name: 'Sunday',
 *   shortName: 'Sun',
 *   index: 0,
 *   number: 1,
 *   toString: [Function (anonymous)]
 * }
 */

var { year, month, weekDay, day } = date;

console.log(`${weekDay.name} ${year}/${month}/${day}`); //Sunday 2022/10/23

date.year = 2020;
date.month = 8;
date.day = 21;

date.isLeap; //true
date.isValid; //true
date.isUTC; //false
date.month.name; //August
date.month.length; //31
date.month.index; //7
date.month.number; //8

date.weekDay.name; //Friday
date.weekDay.index; //5
date.weekDay.number; //6

date.dayOfBeginning; //737658
date.dayOfYear; //234
date.daysLeft; //132
date.weekOfYear; //34
date.unix; //1597951800 (unix time in seconds)

date.weekDays; // array [{ name: 'Sunday', shortName: 'Sun', ...}]
date.months; //array [{ name: 'January', shortName: 'Jan', ...}]
date.leaps; //array [4,   8,  12,  16,  20,...]

date.calendar.name; //gregorian

4-6- parse(date:String)

Remember that parsing date is based on the format you set

import DateObject from "react-date-object";
import persian from "react-date-object/calendars/persian";
import persian_en from "react-date-object/locales/persian_en";

var date = new DateObject();

date._format = "dddd DD MMMM YYYY";

date.parse("Monday 24 August 2020");
console.log(date.format("YYYY/MM/DD")); //2020/08/24

date.parse("Friday 07 August 2020");
console.log(date.format("YYYY-MM-DD")); //2020-08-07

date
  .setCalendar(persian)
  .setLocale(persian_en)
  .setFormat("YYYY/MM/DD")
  .parse("1399/06/03");
console.log(date.format()); //1399/06/03

date.setFormat("YYYY/MM/DD HH:mm").parse("1399/06/03 12:32");
console.log(date.format("dddd DD MMMM @ hh:mm a")); //Doshanbeh 03 Shahrivar @ 12:32 pm

4-7- getValue

import DateObject from "react-date-object";
import arabic_ar from "react-date-object/locales/arabic_ar.js";

var date = new DateObject({
  date: "1442/01/01",
  calendar: arabic,
  locale: arabic_ar,
});

console.log(date.getValue("M")); //1
console.log(date.format("M")); //١

console.log(typeof date.getValue("D")); //number
console.log(typeof date.format("D")); //string

console.log(Number(date.getValue("YYYY"))); //1442
console.log(Number(date.format("YYYY"))); //NaN

4-8- add(duration:Number or String,type:String)

Types
years	year	y
months	month	M
days	day	d
hours	hour	h
minutes	minute	m
seconds	second	s
milliseconds	millisecond	ms

import DateObject from "react-date-object";

var date = new DateObject("2020/10/07 5:35:24 pm");

date.setFormat("YYYY/MM/DD hh:mm:ss.SSS");

console.log(date.add(2, "years").format()); //2022/10/07 05:35:24.000
console.log(date.add("1", "month").format()); //2022/11/07 05:35:24.000
console.log(date.add(3, "d").format()); //2022/11/10 05:35:24.000
console.log(date.add(4, "hours").format()); //2022/11/10 09:35:24.000
console.log(date.add(1, "minute").format()); //2022/11/10 09:36:24.000
console.log(date.add("20", "s").format()); //2022/11/10 09:36:44.000
console.log(date.add(100, "milliseconds").format()); //2022/11/10 09:36:44.100

4-9- subtract(duration:Number or String,type:String)

Types
years	year	y
months	month	M
days	day	d
hours	hour	h
minutes	minute	m
seconds	second	s
milliseconds	millisecond	ms

import DateObject from "react-date-object";

var yesterday = new DateObject().subtract(1, "day");

4-10- set method

4-10-1 set(key:String,value:Any)

import DateObject from "react-date-object";
import indian from "react-date-object/calendars/indian";
import persian from "react-date-object/calendars/persian";
import indian_hi from "react-date-object/locales/indian_hi";
import persian_en from "react-date-object/locales/persian_en";

var date = new DateObject(); //2020/10/31

console.log(date.set("year", 2021)); //2021/10/31
console.log(date.set("month", 1)); //2021/01/31
console.log(date.set("day", 7)); //2021/01/07
console.log(date.set("format", "MM/DD/YYYY")); //01/07/2021
console.log(date.set("calendar", indian)); //10/17/1942
console.log(date.set("locale", indian_hi)); //१०/१७/१९४२
console.log(date.set("date", new Date())); //2020/10/31 (calendar is set to gregorian)
console.log(
  date.set("date", new DateObject({ calendar: persian, locale: persian_en }))
); //1399/08/10 (calendar & locale is set to given values)

4-10-2 set(object)

import DateObject from "react-date-object/index";
import persian from "react-date-object/calendars/persian";
import gregorian from "react-date-object/calendars/gregorian";
import persian_en from "react-date-object/locales/persian_en";
import gregorian_en from "react-date-object/locales/gregorian_en";

var date = new DateObject(); //2020/10/31

console.log(
  date
    .set({ calendar: persian, locale: persian_en, format: "dddd DD MMMM YYYY" })
    .format()
); //Shanbeh 10 Aban 1399

console.log(
  date
    .set({
      calendar: gregorian,
      locale: gregorian_en,
      year: 2020,
      month: 11,
      day: 12,
    })
    .format()
); //Saturday 12 December 2020

console.log(date.set(new DateObject().toObject()).format()); //2020/10/31

console.log(
  date.set({ format: "Date:MM/DD/YYYY", ignoreList: ["Date"] }).format()
); //Date:10/31/2020

4-11- toUTC()

import DateObject from "react-date-object";
import arabic from "react-date-object/calendars/arabic";
import gregorian from "react-date-object/calendars/gregorian";
import arabic_en from "react-date-object/locales/arabic_en";
import gregorian_en from "react-date-object/locales/gregorian_en";

var date = new Date(); //Wed Oct 14 2020 11:12:18 GMT+0330

var dateObject = new DateObject({
  date,
  calendar: arabic,
  locale: arabic_en,
  format: "ddd, DD MMM YYYY HH:mm:ss",
});

console.log(dateObject.format()); //Arb, 26 Sa 1442 11:12:18

console.log(`
dateUTC      : ${date.toUTCString()}
arabicUTC    : ${dateObject.toUTC().toString()}
gregorianUTC : ${dateObject.convert(gregorian, gregorian_en).toString()}
`);

/**
 * dateUTC      : Wed, 14 Oct 2020 07:42:18 GMT
 * arabicUTC    : Arb, 26 Sa 1442 07:42:18
 * gregorianUTC : Wed, 14 Oct 2020 07:42:18
 */

4-12- custom months, week days & digits

See the example below in case you want to use your personal data instead of default months, week days & digits

import DateObject from "react-date-object";

var date = new DateObject();

console.log(date.format("MMMM MMM")); //November Nov
console.log(date.format("dddd ddd")); //Monday Mon
console.log(date.format("D")); //2

date.months = [
  ["jan", "j"], //[["name","shortName"], ... ]
  ["feb", "f"],
  ["mar", "m"],
  ["apr", "a"],
  ["may", "m"],
  ["jun", "j"],
  ["jul", "j"],
  ["aug", "a"],
  ["sep", "s"],
  ["oct", "o"],
  ["nov", "n"],
  ["dec", "d"],
];

date.weekDays = [
  ["su", "s"], //[["name","shortName"], ... ]
  ["mo", "m"],
  ["tu", "t"],
  ["we", "w"],
  ["th", "t"],
  ["fr", "f"],
  ["sa", "s"],
];

/**
 * This is just a test to display digits.
 * The Greek number system does not work like this.
 */
date.digits = ["", "I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX"];

console.log(date.format("MMMM MMM")); //nov n
console.log(date.format("dddd ddd")); //mo m
console.log(date.format("D")); //II

console.log(date.month);

/**
 *{
 * name: 'nov',
 * shortName: 'n',
 * length: 30,
 * index: 10,
 * number: 11,
 * toString: [Function (anonymous)]
 * valueOf: [Function: valueOf]
 *}
 */

console.log(date.weekDay);

/**
 *{
 * name: 'mo',
 * shortName: 'm'
 * index: 1,
 * number: 2,
 * toString: [Function: toString],
 * valueOf: [Function: valueOf]
 *}
 */

console.log(date.digits);

/**
 * [
 *  '',    'I',   'II',
 *  'III', 'IV',  'V',
 *  'VI',  'VII', 'VIII',
 *  'IX'
 * ]
 */

You can use date.setMonths(months).setWeekDays(weekDays).setDigits(digits) as well

4-13- other methods

import DateObject from "react-date-object";

var date = new DateObject();

console.log(date.toFirstOfWeek().format()); //2020/08/16
console.log(date.toFirstOfMonth().format()); //2020/08/01
console.log(date.toFirstOfYear().format()); //2020/01/01
console.log(date.toFirstWeekOfYear().format()); //2020/01/05
console.log(date.toLastOfMonth().format()); //2020/01/31
console.log(date.toLastOfWeek().format()); //2020/02/01
console.log(date.toLastOfYear().format()); //2020/12/31
console.log(date.toLastWeekOfYear().format()); //2020/12/27

console.log(date.toString()); //2020/12/27
console.log(date.toDate()); //2020-12-27T07:38:34.724Z
console.log(date.toUnix()); //1609054714 (unix time in seconds)
console.log(date.toJulianDay()); //2459210
console.log(date.toObject());
/**
 *{
 *  year: 2020,
 *  month: {
 *    name: 'December',
 *    shortName: 'Dec',
 *    length: 31,
 *    index: 11,
 *    number: 12,
 *    toString: [Function: toString],
 *    valueOf: [Function: valueOf]
 *  },
 *  day: 27,
 *  weekDay: {
 *    name: 'Sunday',
 *    shortName: 'Sun',
 *    index: 0,
 *    number: 1,
 *    toString: [Function: toString],
 *    valueOf: [Function: valueOf]
 *  },
 *  hour: 11,
 *  minute: 8,
 *  second: 34,
 *  millisecond: 724,
 *  weekOfYear: 52,
 *  dayOfYear: 362,
 *  daysLeft: 4,
 *  calendar: {
 *    name: 'gregorian',
 *    startYear: 1,
 *    yearLength: 365,
 *    epoch: 1721424,
 *    century: 20,
 *    weekDaysIndex: [
 *      0, 1, 2, 3,
 *      4, 5, 6
 *    ],
 *    getMonthLengths: [Function: getMonthLengths],
 *    isLeap: [Function: isLeap],
 *    getLeaps: [Function: getLeaps],
 *    getDayOfYear: [Function: getDayOfYear],
 *    getAllDays: [Function: getAllDays],
 *    leapsLength: [Function: leapsLength],
 *    guessYear: [Function: guessYear]
 *  },
 *  locale: {
 *    months: [
 *      [Array], [Array],
 *      [Array], [Array],
 *      [Array], [Array],
 *      [Array], [Array],
 *      [Array], [Array],
 *      [Array], [Array]
 *    ],
 *    weekDays: [
 *      [Array], [Array],
 *      [Array], [Array],
 *      [Array], [Array],
 *      [Array]
 *    ],
 *    digits: [
 *      '0', '1', '2', '3',
 *      '4', '5', '6', '7',
 *      '8', '9'
 *    ],
 *    meridiems: [ [Array], [Array] ]
 *  },
 *  format: 'YYYY/MM/DD',
 *  ignoreList: []
 *}
 */
console.log(date.toJSON()); //1609054714724

console.log(JSON.stringify({ date })); //{"date":1609054714724}
console.log(new DateObject(date.toJSON()).format()); //2020/12/27

4-14 valueOf()

returns unix time in milliseconds

import DateObject from "react-date-object";
import persian_calendar from "react-date-object/calendars/persian";
import arabic_calendar from "react-date-object/calendars/arabic";
import indian_calendar from "react-date-object/calendars/indian";

var gregorian = new DateObject();
var persian = new DateObject({ date: gregorian, calendar: persian_calendar });
var arabic = new DateObject({ date: gregorian, calendar: arabic_calendar });
var indian = new DateObject({ date: gregorian, calendar: indian_calendar });

console.log(gregorian.valueOf(), gregorian.format()); //1604824018304 2020/11/08
console.log(persian.valueOf(), persian.format()); //1604824018304 1399/08/18
console.log(indian.valueOf(), indian.format()); //1604824018304 1942/08/17
console.log(arabic.valueOf(), arabic.format()); //1604824018304 1442/03/22

console.log(persian - gregorian === 0); //true

4-15- using calendars, format & locales

import DateObject from "react-date-object";
import gregorian from "react-date-object/calendars/gregorian";
import persian from "react-date-object/calendars/persian";
import arabic from "react-date-object/calendars/arabic";
import persian_fa from "react-date-object/locales/persian_fa";
import gregorian_en from "react-date-object/locales/gregorian_en";

var date = new DateObject({
  calendar: gregorian,
  format: "dddd DD MMMM",
});

console.log(date.format()); //Friday 21 August

date.calendar = persian;
date.locale = persian_fa; //جمعه 31 مرداد
console.log(date.format());

date._format = "YY/MM/DD";
console.log(date.format()); //۹۹/۰۵/۳۱

date.setCalendar(gregorian).setLocale(gregorian_en);
console.log(date.format()); //20/08/21

date = new DateObject(new Date());

console.log(date.convert(persian).format()); //1399/05/31
console.log(date.convert(arabic).format()); //1442/01/02

5- Formatting Tokens

Token	Example	Description	Availability (Parse /Format)
YYYY	2020	full year	both
YY	20	2 digits year	both
MMMM	December	month name	both
MMM	Dec	month short name	both
MM	03, 09, 10, ...	2 digits month number	both
M	3, 9, 10, ...	month number	both
DDDD	09	day of year	format
DDD	9	day of year	format
DD	03, 09, 10, 17, ...	2 digits day of month	both
D	3, 9 ,10, 17	day of month	both
WW	01, 03, 24, 33, ...	week of year	format
W	1, 3, 24. 33, ...	week of year	format
dddd	Saturday, Sunday, Monday, ...	week day name	format
ddd	Sat, Sun, Mon, ...	week day short name	format
dd	01,02,...,07	2 digits week day number	format
d	1,2,...,7	week day number	format
HH	03, 09, 10, 17,...	2 digits hour (24 hour mode)	both
H	3, 9, 10, 17,...	hour (24 hour mode)	both
hh	03, 09, 10, 17,...	2 digits hour (12 hour mode)	both
h	3, 9, 10, 17,...	hour (12 hour mode)	both
mm	03, 09, 10, 17,...	2 digits minute	both
m	3, 9, 10, 17,...	minute	both
ss	03, 09, 10, 17,...	2 digits second	both
s	3, 9, 10, 17,...	second	both
SSS	100	3 digits millisecond	both
SS	10	2 digits millisecond	both
S	1	1 digit millisecond	both
A	AM	meridiem	both
a	am	meridiem lowercase	both

react-date-object's Issues

invalid date not working

Q: How can I check for invalid combination of a year-month-day ?!

when I create a new date with invalid month or day it is transformed to another valid date :

const birthDate = new DateObject({
year: 1942,
month: 84,
day: 55
})

console.log(birthDate.format('YYYY-MM-DD'), birthDate.isValid) //1949-01-24 true
(expected: 1942-84-55, false)

date doesn't return the value. it returns empty object

hi, i'm using the package date picker
in , when i want to set the date value on state on onChange, it won't set and i just get an empty object :
Object { }

how can i get the date value ?
thanks ..

Is there any support for Italian Version for date ?

new bad syntax error at using the package version 2.1.6

we need urgent help!
with node version 14.17, with your earlier change (1 day ago) we have faced with syntax error while building nextjs project.

...
3:6434,6437:6439,6441:6443,6445:6447,6449:6451,6454:6455,6458:6459,6462:6463,6466:6468,6470:6472,6474:6476,6478:6480,6482:6484,6487:6488,6491:6492,6495:6496};for(;e>0?t<=e:e<=t;){if(s+=e>0?r:-1*r,s>1&&(s-=1),s<0&&(s+=1),s>=.257800926&&s<=.5){let r=n[t]||t<-1?t+1:t;e>0&&r<=e&&a.push(r),e<0&&a.push(r)}e>0?t++:t--}return a},getDayOfYear:({month:{index:e},day:t})=>(e<=6?31*e:186+30*(e-6))+t,getAllDays(e){const{year:t}=e,a=this.getLeaps(t),r=a.includes(t);return this.yearLength*(t-1)+(r?a.length-1:a.length)+this.getDayOfYear(e)},guessYear:(e,t)=>~~((e+.5)/365.241)+(t>0?1:-1)};export{e as default};
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
SyntaxError: Unexpected token 'export'
    at wrapSafe (internal/modules/cjs/loader.js:1001:16)
    at Module._compile (internal/modules/cjs/loader.js:1049:27)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1114:10)
    at Module.load (internal/modules/cjs/loader.js:950:32)
    at Function.Module._load (internal/modules/cjs/loader.js:790:12)
    at Module.require (internal/modules/cjs/loader.js:974:19)
    at require (internal/modules/cjs/helpers.js:101:18)
...

Declare gregorian_pt_br.js in the index.d.ts

Hello, i'm getting a error when using the pt br language, the import says that the file should be declared in the index.d.ts file

Translation:

"Could not locate the declaration file for the module 'react-date-object/locales/gregorian_pt_br'. '***/frontend/node_modules/react-date-object/locales/gregorian_pt_br.js' implicitly has a 'any' type.
If the 'react-date-object' package does indeed expose this module, try adding a new declaration file (.d.ts) containing the module declare 'react-date-object/locales/gregorian_pt_br';."

I am using Vike with SSR and have the error:

How to Calculate the Difference between the 2 date objects

How to calculate the difference between the 2 date objects?
For eg.:
let currentDate = new DateObject();
let previousDate = new DateObject(4,'days');
let difference = previousDate - currentDate; // Which will be 4 in number

Suggestion would help me out.

Error: __vite_ssr_import_0__.default is not a constructor

Hi, I am using Vike with SSR component and receiving the error message:

Error: vite_ssr_import_0.default is not a constructor

In the component, i use import DateObject from 'react-date-object'. When I use CSR, this works well.
Any answer is welcome. Thanks a lot.