How to generate momentjs format from custom time object

Context:

Hi, I am trying to generate a moment.js format from the given start time and end time.

let sourceTime = {
  "startTime": "0600", // 6 AM
  "endTime": "2100" // 9 PM
}

Using the above endTime property I am trying to get time in the format below :

2021-02-04T09:00 pm i.e This format https://momentjs.com/docs/#/displaying/format/ – “YYYY-MM-DDThh:mm a”

using this piece of code

let currentDate = moment().format('DD-MM-YYYY');
let savedFormat = moment(`${currentDate} ${sourceTime.endTime.substring(0, 2)}:${sourceTime.endTime.substring(2, 4)}`).format('YYYY-MM-DDThh:mm')

Where I am adding the current date and end time in a customized way using a string literal to generate the desired format.

Problem:

I am getting 9:00 am instead of 9:00 pm.

2021-02-04T09:00 am

Not sure where I’m doing wrong. Any suggestion would be helpful.

let sourceTime = {
  "startTime": "0600", // 6 AM
  "endTime": "2100" // 9 PM
}

let currentDate = moment().format('DD-MM-YYYY');
let savedFormat = moment(`${currentDate} ${sourceTime.endTime.substring(0, 2)}:${sourceTime.endTime.substring(2, 4)}`).format('YYYY-MM-DDThh:mm')

console.log(savedFormat);

//Shows am instead of pm
console.log(moment(savedFormat).format('YYYY-MM-DDThh:mm a'));
//OUTPUT

<script src="https://momentjs.com/downloads/moment.min.js"></script>

Answer

After consulting Momentjs Format, I would propose the following solution:

let sourceTime = {
  "startTime": "0600", // 6 AM
  "endTime": "2100" // 9 PM
}
const startTime = moment(sourceTime.startTime, 'HHmm').format('YYYY-MM-DD h:mm a');
const endTime = moment(sourceTime.endTime, 'HHmm').format('YYYY-MM-DD h:mm a');

console.log(startTime + ' to ' + endTime);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.1/moment.min.js"></script>