Angular 5 - how to make the period field type lowercase in DatePipe

You can just split your date to 2 parts:

{{ today | date : 'EEEE, MMMM d, h:mm' }} {{ today | date : 'a' | lowercase }}   

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UPDATE

Here is another simple way to achieve it, using built in date pipe and aaaaa matcher (which returns lowercase a or p):

<div>{{ today | date : 'EEEE, MMMM d, h:mm aaaaa\'m\'' }}</div>

Updated Stackblitz: https://stackblitz.com/edit/angular-dcpgzb?file=app%2Fapp.component.html

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ANGULAR JS solution

app.controller('MainCtrl', function($scope, $locale) {  $locale.DATETIME_FORMATS.AMPMS = ['am', 'pm'];  $scope.today = new Date();});

https://plnkr.co/edit/a49kjvOdifXPAvBlmXEi?p=preview

Bummer. This is still the case with Angular 5.

I've created a custom pipe which applies a lowercase transform to the text matching a provided regex.

Lowercase Match Pipe

lowercase-match.pipe.ts

import { Pipe, PipeTransform  } from '@angular/core';@Pipe({  name: 'lowercaseMatch'})export class LowerCaseMatchPipe implements PipeTransform {  transform (input: any, pattern: any): any {    if (!this.isString(input)) {      return input;    }    const regexp = pattern instanceof RegExp ? pattern : new RegExp(pattern, 'gi');    return input.toLowerCase()    if (input.match(regexp)) {      return input.toLowerCase()    }    return input  }  isString(value: any): boolean {    return typeof value === 'string';  }}

Usage

Import to Module

import { LowerCaseMatchPipe } from './lowercase-match.pipe';@NgModule({  declarations: [    ...    LowerCaseMatchPipe  ],  ...})export class AppModule { }

Display date with lowercase am/pm

{{ today | date : 'EEEE, MMMM d, h:mm a' | lowercaseMatch : 'am|pm' }}

There is some discussion about this casing notion on an GitHub Issue for Angularhttps://github.com/angular/angular.js/issues/8763

The form that would best be presented would be:

{{ today | date: 'MMM d, y, h:mm' | titlecase }}