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+# jalali-plugin-dayjs
+[![npm (scoped with tag)](https://img.shields.io/npm/v/jalali-plugin-dayjs/latest.svg?style=flat-square)](https://npmjs.com/package/jalali-plugin-dayjs)
+[![npm](https://img.shields.io/npm/dt/jalali-plugin-dayjs.svg?style=flat-square)](https://npmjs.com/package/jalali-plugin-dayjs)
+[![js-standard-style](https://img.shields.io/badge/code_style-standard-brightgreen.svg?style=flat-square)](http://standardjs.com)
+
+Persian (Jalali, Khorshidi) Plugin for [Day.js](https://github.com/iamkun/dayjs), jalali-plugin-dayjs add multi-calendar functionality to Day.js core regardless for of locale, so we can have Gregorian calendar is Persian locale of Jalali calendar in English locale  
+Unlike moment and becuase of immutablity of dayjs, there is no need for formats like `jYYYY` or `jMM`, in jalali-plugin-dayjs all formats are same and standard
+ 
+## Installation
+NPM
+```
+npm install --save jalali-plugin-dayjs
+```
+YARN
+```
+yarn add jalali-plugin-dayjs
+```
+
+## Usage
+```javascript
+import dayjs from 'dayjs'
+import jalaliday from 'jalali-plugin-dayjs'
+
+dayjs.extend(jalaliday)
+```
+
+### Changing calendar
+If you want to all new instanses of dayjs use `jalali` calendar, you can set default calendar
+```javascript
+dayjs.calendar('jalali') // Jalali Calendar
+// OR
+dayjs.calendar('gregory') // Gregorian Calendar
+```
+also you can create a jalali date without changing default calendar
+```javascript
+const date = dayjs()
+const jalaliDate = date.calendar('jalali')
+```
+
+### Parse Date
+- Parse Gregory date 
+```js
+const date = dayjs('2018-04-04T16:00:00.000Z');
+```
+- Parse Jalali date
+```js
+const date = dayjs('1398-10-17', { jalali: true });
+```
+
+### Multiple Locale
+with combination of `calendar` and `locale` we have multi language for real
+```javascript
+dayjs().calendar('jalali').locale('en').format('DD MMMM YYYY') // '13 Shahrivar 1397'
+dayjs().calendar('gregory').locale('fa').format('DD MMMM YYYY') // '04 سپتامبر 2018'
+```
+
+### API
+All Api operations of jalali-plugin-dayjs is same as Dayjs itself but calendar based, for more information checkout [Dayjs API](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md)
+For a glance:
+- [API Reference](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#api-reference)
+  - [Parsing](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#parsing)
+    - [Constructor `dayjs(existing?: string | number | Date | Dayjs)`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#constructor-dayjsexisting-string--number--date--dayjs)
+      - [ISO 8601 string](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#iso-8601-string)
+      - [Unix Timestamp (milliseconds since the Unix Epoch - Jan 1 1970, 12AM UTC)](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#unix-timestamp-milliseconds-since-the-unix-epoch---jan-1-1970-12am-utc)
+      - [Native Javascript Date object](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#native-javascript-date-object)
+    - [Clone `.clone() | dayjs(original: Dayjs)`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#clone-clone-dayjsoriginal-dayjs)
+    - [Validation `.isValid()`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#validation-isvalid)
+  - [Get and Set](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#get-and-set)
+    - [Year `.year()`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#year-year)
+    - [Month `.month()`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#month-month)
+    - [Day of the Month `.date()`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#day-of-the-month-date)
+    - [Day of the Week `.day()`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#day-of-the-week-day)
+    - [Hour `.hour()`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#hour-hour)
+    - [Minute `.minute()`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#minute-minute)
+    - [Second `.second()`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#second-second)
+    - [Millisecond `.millisecond()`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#millisecond-millisecond)
+    - [Set `.set(unit: string, value: number)`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#set-setunit-string-value-number)
+  - [Manipulating](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#manipulating)
+    - [Add `.add(value: number, unit: string)`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#add-addvalue-number-unit-string)
+    - [Subtract `.subtract(value: number, unit: string)`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#subtract-subtractvalue-number-unit-string)
+    - [Start of Time `.startOf(unit: string)`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#start-of-time-startofunit-string)
+    - [End of Time `.endOf(unit: string)`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#end-of-time-endofunit-string)
+  - [Displaying](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#displaying)
+    - [Format `.format(stringWithTokens: string)`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#format-formatstringwithtokens-string)
+      - [List of all available formats](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#list-of-all-available-formats)
+    - [Difference `.diff(compared: Dayjs, unit: string (default: 'milliseconds'), float?: boolean)`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#difference-diffcompared-dayjs-unit-string-default-milliseconds-float-boolean)
+    - [Unix Timestamp (milliseconds) `.valueOf()`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#unix-timestamp-milliseconds-valueof)
+    - [Unix Timestamp (seconds) `.unix()`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#unix-timestamp-seconds-unix)
+    - [Days in the Month `.daysInMonth()`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#days-in-the-month-daysinmonth)
+    - [As Javascript Date `.toDate()`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#as-javascript-date-todate)
+    - [As Array `.toArray()`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#as-array-toarray)
+    - [As JSON `.toJSON()`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#as-json-tojson)
+    - [As ISO 8601 String `.toISOString()`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#as-iso-8601-string-toisostring)
+    - [As Object `.toObject()`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#as-object-toobject)
+    - [As String `.toString()`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#as-string-tostring)
+  - [Query](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#query)
+    - [Is Before `.isBefore(compared: Dayjs)`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#is-before-isbeforecompared-dayjs)
+    - [Is Same `.isSame(compared: Dayjs)`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#is-same-issamecompared-dayjs)
+    - [Is After `.isAfter(compared: Dayjs)`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#is-after-isaftercompared-dayjs)
+    - [Is a Dayjs `.isDayjs()`](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#is-a-dayjs-isdayjscompared-any)
+  - [Plugin APIs](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#plugin-apis)
+    - [RelativeTime](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#relativetime)
+    - [IsLeapYear](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#isleapyear)
+    - [WeekOfYear](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#weekofyear)
+    - [IsBetween](https://github.com/iamkun/dayjs/blob/master/docs/en/API-reference.md#isbetween)