Angular Material Datepicker Format

Written by: Arvind Rai,
Last updated: July 07, 2020
AngularAngular Material
This page will walk through Angular Material Datepicker format example. Angular Material provides MAT_DATE_FORMATS object which is the collection of formats used by Datepicker to parse and display dates. To use custom date format we need to override MAT_DATE_FORMATS with given formats. The MAT_DATE_FORMATS is used by DateAdapter of Datepicker and hence our custom date formats should be compatible to the DateAdapter used by our application.
Here on this page we will provide complete detail to parse and display dates by our Datepicker using custom date formats with moment.js.
Contents

1. Technologies Used

Find the technologies being used in our example.
1. Angular 10.0.0
2. Angular Material 10.0.0
3. Node.js 12.5.0
4. NPM 6.9.0
5. moment.js 2.27.0

2. Create Custom Date Format

Create a custom date format for parsing and displaying by Datepicker.
my-date-formats.ts 
export const MY_DATE_FORMATS = {
    parse: {
      dateInput: 'DD-MM-YYYY',
    },
    display: {
      dateInput: 'MMM DD, YYYY',
      monthYearLabel: 'MMMM YYYY',
      dateA11yLabel: 'LL',
      monthYearA11yLabel: 'MMMM YYYY'
    },
};
Let us understand the properties used in parse and display section of our custom format by diagram..
Angular Material Datepicker Format
Find the description of points given in diagram.
(1) 
parse: {
  dateInput: 'DD-MM-YYYY',
}
The dateInput property in parse section is the date format in which a user enters date manually in input box. Using this date format Datepicker parses the input date and then displays it in its display date input format.

(2) 
display: {
  dateInput: 'MMM DD, YYYY',
}
The dateInput property in display section is the date format in which Datepicker displays the date in input box. Either date can be selected from calendar or date can be entered manually. Finally Datepicker will display date in display date input format.

(3) 
display: {
  monthYearLabel: 'MMMM YYYY',
}
This monthYearLabel property in display section is the date format in which calendar displays the month-year label.

(4) 
display: {
  dateA11yLabel: 'LL',
  monthYearA11yLabel: 'MMMM YYYY'
}
The dateA11yLabel and monthYearA11yLabel properties are related to Accessibility (a11y).
The Accessibility (a11y) project is community driven effort to make web accessibility easier for all people including those with disabilities or impairments. The Accessibility (a11y) project emphasizes to make a system accessible to the people with disabilities such as visual impairment, hearing loss etc.

3. Configure MAT_DATE_FORMATS to use Custom Date Format

We have created custom parse and display format as MY_DATE_FORMATS in the above section. Now we need to configure it in our application module with MAT_DATE_FORMATS.
Let us know some points.

1. Angular Material uses DateAdapter to create a Datepicker such as NativeDateAdapter, MomentDateAdapter or custom DateAdapter.

2. The DateAdapter can be provided by MatNativeDateModule, MatMomentDateModule, or a custom implementation.

3. The MatNativeDateModule provides NativeDateAdapter and MatMomentDateModule provides MomentDateAdapter.

4. The MatNativeDateModule and MatMomentDateModule use default parse and display formats.

5. The NativeDateModule and MomentDateModule without Mat -prefix, does not contain default parse and display formats. So for custom date formats we should import NativeDateModule or MomentDateModule.

6. The NativeDateModule uses native JavaScript date and MomentDateModule uses Moment from moment.js.

7. To provide custom date format we need to configure MAT_DATE_FORMATS either with NativeDateModule or MomentDateModule.

Find the code snippet to configure MAT_DATE_FORMATS in application module. Here we are importing MomentDateModule.
app.module.ts 
import { MatInputModule } from '@angular/material/input';
import { MatDatepickerModule } from '@angular/material/datepicker';
import { MomentDateModule } from '@angular/material-moment-adapter';
import { MAT_DATE_FORMATS } from '@angular/material/core';

import { MY_DATE_FORMATS } from './my-date-formats';

@NgModule({
  imports: [
    MatInputModule, 
    MatDatepickerModule,
    MomentDateModule
  ],
  providers: [
    { provide: MAT_DATE_FORMATS, useValue: MY_DATE_FORMATS }
  ],
  ------ 
})
export class AppModule { }

4. moment.js

The moment.js is free and open source JavaScript library. The moment.js is the wrapper on native JavaScript Date. The moment.js can be used to parse and display dates using MomentDateModule or MatMomentDateModule.
To start working with moment.js in our application we need to install it as following. 
npm install moment --save
Find some year, month and day tokens with examples. Tokens are case sensitive.
YYYY ( 2019)
YY (19)
MM (11)
MMM (Jun)
MMMM (June)
DD (25)

Find some locale aware formats with examples.
L (14/08/2019)
LL (August 14 2019)

5. Set Date with moment.js

To set date with moment.js, we need to import moment in our component. 
import * as _moment from 'moment';
const moment = _moment;
Now we can assign moment to our FormControl as following. 
this.studentForm.patchValue({
  dateOfBirth: moment("12/25/1995", "MM/DD/YYYY"),
  admDateRange: {
	startDate: moment("June 01, 2020", "MMM DD,YYYY"),
	endDate: moment("July 31, 2020", "MMM DD,YYYY")
  }
});
We can set moment in following ways.
1. 
moment()
Sets the current date and time from system.
2. 
moment("10-20-1990", "MM-DD-YYYY")
The given date string is parsed according to given date format.
3. 
moment("2019-10-20 6:30 +0000", "YYYY-MM-DD HH:mm Z")
Date and time string is parsed according to given date time format and time zone.
4. 
moment([2019, 5, 14, 15, 25, 50, 525])
The moment can be instantiated using array with given format. 
[year, month, day, hour, minute, second, millisecond]
Except the year, other values are optional. We can assign moment as following, too. 
moment([2019, 5, 14])

6. Get Date as Moment from Datepicker

We have created the Datepicker using moment.js. We can fetch date as Moment in our component as following.
Import the Moment. 
import { Moment } from 'moment';
Assign the date value to Moment data type variable. 
let dateOfBirth: Moment = this.studentForm.get('dateOfBirth').value;
let yearOfBirth = dateOfBirth.toObject().years;

7. Complete Example

my-date-formats.ts 
export const MY_DATE_FORMATS = {
    parse: {
      dateInput: 'DD-MM-YYYY',
    },
    display: {
      dateInput: 'MMM DD, YYYY',
      monthYearLabel: 'MMMM YYYY',
      dateA11yLabel: 'LL',
      monthYearA11yLabel: 'MMMM YYYY'
    },
};
app.module.ts 
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { FormsModule, ReactiveFormsModule }    from '@angular/forms'; 
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { MatInputModule } from '@angular/material/input';
import { MatDatepickerModule } from '@angular/material/datepicker';
import { MomentDateModule } from '@angular/material-moment-adapter';
import { MAT_DATE_FORMATS } from '@angular/material/core';

import { AppComponent } from './app.component';
import { StudentComponent } from './student.component';
import { MY_DATE_FORMATS } from './my-date-formats';

@NgModule({
  declarations: [
    AppComponent,
    StudentComponent
  ],
  imports: [
    BrowserModule,
    FormsModule,
    ReactiveFormsModule,
    BrowserAnimationsModule,
    MatInputModule, 
    MatDatepickerModule,
    MomentDateModule
  ],
  providers: [
    { provide: MAT_DATE_FORMATS, useValue: MY_DATE_FORMATS }
  ],
  bootstrap: [ AppComponent ]
})
export class AppModule { }
student.component.ts 
import { Component, OnInit } from '@angular/core';
import { FormBuilder, FormControl } from '@angular/forms';
import { StudentService } from './student.service';

import * as _moment from 'moment';
import { Moment } from 'moment';

const moment = _moment;

@Component({
  selector: 'app-student',
  templateUrl: './student.component.html'
})
export class StudentComponent implements OnInit {
  constructor(private formBuilder: FormBuilder, private studentService: StudentService) { }
  ngOnInit() {
  }
  studentForm = this.formBuilder.group({
    name: '',
    dateOfBirth: '',
    admDateRange: this.formBuilder.group({
      startDate: '',
      endDate: ''
    })
  });
  onFormSubmit() {
    this.studentService.saveStudent(this.studentForm.value);
    let dateOfBirth: Moment = this.studentForm.get('dateOfBirth').value;
    console.log(dateOfBirth.toObject());
    let yearOfBirth = dateOfBirth.toObject().years;
    console.log('yearOfBirth : ', yearOfBirth);
    this.studentForm.reset();
  }
  setDefaultDate() {
    this.studentForm.patchValue({
      dateOfBirth: moment("12/25/1995", "MM/DD/YYYY"),
      admDateRange: {
        startDate: moment("June 01, 2020", "MMM DD,YYYY"),
        endDate: moment("July 31, 2020", "MMM DD,YYYY")
      }
    });
  }
}
student.component.html 
<h3>Datepicker Format</h3>
<form [formGroup]="studentForm" (ngSubmit)="onFormSubmit()">
  <mat-form-field>
    <mat-label>Student Name</mat-label>
    <input matInput formControlName="name">
  </mat-form-field>
  <br/>
  <mat-form-field appearance="fill">
    <mat-label>Date of Birth</mat-label>
    <input matInput [matDatepicker]="dob" formControlName="dateOfBirth">
    <mat-datepicker-toggle matSuffix [for]="dob"></mat-datepicker-toggle>
    <mat-datepicker #dob></mat-datepicker>
  </mat-form-field>
  <br/>
  <mat-form-field appearance="fill">
    <mat-label>Admission Date Range</mat-label>
    <mat-date-range-input [rangePicker]="admDateRangePicker"  formGroupName="admDateRange">
      <input matStartDate formControlName="startDate" placeholder="Start date">
      <input matEndDate formControlName="endDate" placeholder="End date">
    </mat-date-range-input>
    <mat-datepicker-toggle matSuffix [for]="admDateRangePicker"></mat-datepicker-toggle>
    <mat-date-range-picker #admDateRangePicker></mat-date-range-picker>
  </mat-form-field>
  <br/><br/>
  <button mat-raised-button>Submit</button>
  <button mat-raised-button type="button" (click)="setDefaultDate()">Set Default Dates</button>
</form>
student.service.ts 
import { Injectable } from '@angular/core';

@Injectable({
  providedIn: 'root'
})
export class StudentService {
  saveStudent(student) {
    console.log(JSON.stringify(student));
  }
}
app.component.ts 
import { Component } from '@angular/core';

@Component({
  selector: 'app-root',
  template: `
      <app-student></app-student>
  `
})
export class AppComponent {
}

8. Run Application

To run the application, find the steps.
1. Install Angular CLI using link.
2. Install Angular Material using link.
3. Download source code using download link given below on this page.
4. Use downloaded src in your Angular CLI application.
5. Run ng serve using command prompt.
6. Access the URL http://localhost:4200
Find the print screen of the output.
Angular Material Datepicker Format

9. References

Datepicker
Moment.js Documentation

10. Download Source Code

angular-material-datepicker-format.zip
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ARVIND RAI
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