australian-date-manipulation.js

import moment from 'moment';

const originalDateString = '06/03/2019';
const date = moment(originalDateString, 'DD/MM/YYYY');

//--------------------------------------------------------------
// Convert date string in DD/MM/YYYY format to YYYY-MM-DD format
//--------------------------------------------------------------
const convertedDateString1 = date.format('YYYY-MM-DD');

// console.log(convertedDateString1)        '2019-03-06'

//--------------------------------------------------------------
// Convert date string in DD/MM/YYYY format to YYYY-M-D format
//--------------------------------------------------------------
const convertedDateString2 = date.format('YYYY-M-D');

// console.log(convertedDateString2)        '2019-3-6'

//--------------------------------------------------------------
// Convert date string in DD/MM/YYYY format to MM/DD/YYYY format
//--------------------------------------------------------------
const convertedDateString3 = date.format('MM/DD/YYYY');

// console.log(convertedDateString3)        '03/06/2019'