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How to add time zone to specific format in momentjs?

I am trying to get specific format of datetime with time zone
i am getting string of time format which is shown below
var dateTime = "2020-06-01T01:50:57.000Z CDT"
I need to convert the format in to
const offsetTime = moment(date).add("-0.00", 'hours')
const formatedDate = moment(offsetTime, 'h:mm:ss A')
.utc()
.format('h:mm A')//(1:50 AM)
Required output
(1:50 AM CDT)
Do i need to split the string and get the format or do we have any method to convert it to this format in momentjs
In simple way to say
YYYY-MM-DDTHH:mm:ss.SSS[Z] z To hh:mm A z //format
and if the string contains only 2 character like "CT" instead of CDT how to capture that.

You can zz to get timezone in output. For ex:
moment()..format('h:mm A zz')
More documentation here momentJS

Use the moment-timezone to achieve this. Use the moment constructor to specify the input format, then specifying the required timezone. Finally use moment's format to get the required format
var dateTime = "2020-06-01T01:50:57.000Z CDT";
var timezone = "America/Chicago";
console.log(
moment(dateTime, "YYYY-MM-DD hh:mm:ss zz")
.tz(timezone)
.format("h:mm A zz")
);
<script src="https://momentjs.com/downloads/moment.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment-timezone/0.5.23/moment-timezone-with-data-2012-2022.min.js"></script>

Your date string is in ISO format with the 'Z' after seconds indicating that it is in UTC time. I am assuming that the 'CDT' is placed in the string in order to indicate which time zone this should be converted to. If you have control over how this string is represented then I recommend changing it so that you indicate the desired timezone elsewhere and simply store the date in UTC format. This way you can initialize a date or moment object with the ISO string as follows:
var date = moment("2020-06-01T01:50:57.000Z")
It is inconvenient the way it is currently since you cannot initialize it this way:
var date = moment("2020-06-01T01:50:57.000Z CDT")
The only option for handling the date in its current form is to parse it. You can do that like this:
var dateTime = "2020-06-01T01:50:57.000Z CDT"
var trimmed = dateTime.trim() // remove leading and trailing whitespace
var isoString = trimmed.substr(0, trimmed.indexOf(' '))
Which will produce the following string
2020-06-01T01:50:57.000Z
You can use that string I called "isoString" to initialize a date or moment object. The next obstacle is to handle converting that UTC string to a certain timezone (in this case CDT). It is simple if you want to convert the UTC date to the current users timezone since that will happen automatically when you initialize the moment or date object with the ISO date string. Otherwise, you need some way to get the timezone from 'CDT' into the format moment wants which was shown by #vjr12 ("America/Chicago"). The only way to do this is to either store that with the date string or create a mapping. It is much easier to convert from "America/Chicago" to "CDT" than it is to convert from "CDT" to "America/Chicago". Your only option with the current form is to create your own mapping from "CDT" to "America/Chicago". You could do something like:
let tzMap = new Map()
tzMap.set('CDT','America/Chicago')
// Set the rest of your timezones
You would need to do that for all timezones and then you could use the timezone parsed from your date string like this:
var tzAbbr = trimmed.substr(trimmed.indexOf(' ') + 1)
which will grab the "CDT" or "CT" for that matter. Then you could use your mapping like this:
var timezone = tzMap.get(tzAbbr)
timezone will be "America/Chicago" in this case and then you can use #vjr12 solution from here to get the form you want.
Note
I highly recommend that (if you are able) to change the current format of the datestring that you are using. The purpose of using UTC time is to be timezone agnostic so it does not make sense to store the timezone with the UTC string. If you want to preserve the timezone then you would be better off using a format which already embeds the timezone.

Converting a DateTime Object to a specific timezone

I have a dateTime string "2019-02-14 17:18:22".
I would like to convert this above-mentioned dateTime string to a specific timezone dateTime .
Here the timezone will be extracted from another dateTime string - "2019-02-14T17:28:24+08:00".
I did look up at the utcOffset function but I don't know how to use the offset value (330 in mycase).
Expected result: The first String is fairly simple 5:18 PM .
But once getting converted to the specific timezone, it will be 2:48 PM.

Heres how I use timezone offsets.
I get DateTimeIn, which is offset to (UTC+00:00) from the server.
Then to convert to the browser's timezone (UTC-05:00), i use: getTimezoneOffset() to update the object to the local timezone.
var dateObj = new Date(DateTimeIn);
dateObj.setMinutes(dateObj.getMinutes() + dateObj.getTimezoneOffset());
Without this, my server downloaded datetimes are offset and unusable.

Javascript convert timezone Z to +0000 with moment

The backend API I am working with only understands timezone in +0000 format.
I currently I get a date in the current format:
"2017-12-20T16:39:31.000Z"
With moment.js how would I get it in the following string format?
2017-12-20T16:39:31+0000
So far I have done:
var date = new Date();
this.lastCheckedDate = moment(date).toISOString();

You can use the .format() method to format the date in your own way:
moment("2017-12-20T16:39:31.000Z").format('YYYY-MM-DDTHH:mm:ssZZ');
If the date is in another timezone, I recommend using .utc() first to convert the timezone to UTC, and then format the date:
moment("2017-12-20T16:39:31.000+0530").utc().format('YYYY-MM-DDTHH:mm:ssZZ');

How to convert time and date string to ISO format

I have two inputs, a time and a date input. I'm trying to format them as an ISO string to send to the backend using moment.js.
This is what I have so far 01:00 2016-01-01, I need to format or convert that to ISO. Is there a way to do it using Moment?

To convert ISO I recommend the more standard
date.format();
or
JSON.stringify(yourDate)
or if you prefer momentjs:
var date = moment();
date.toISOString();
or
moment(yourDate).format('MM/DD/YYYY'); // <- your custom format string
To know what are the momentjs formatting rules start reading here

Assuming you are referring to ISO8601 and momentjs (2.10.6), I currently do it like this
var example = momentObject.format("YYYY-MM-DD[T]HH:mm:ss");

You need to use moment's parse function to first create the correct moment object from the data that you have (assuming a 24-hour clock, and month listed before the days):
var myMoment = moment("01:00 2016-01-01", "HH:mm YYYY-MM-DD");
Then you can use moment's format function to output the date in the ISO format that you want. Note that calling the format function without any parameters will output ISO 8601 by default:
myMoment.format();
See the moment docs for more info here.
Hope this helps!

How to convert 2014-04-23T19:45:39 (UTC date) to AST date

I have a date like this:
2014-04-23T19:45:39 which is a UTC format.
I want to convert it to AST format or the localize time zone of the user. How to do it?

I suggest you use moment.js library and just add or subtract number of hours that AST time have comparing to UTC.
new_date = date.add('hours',4);
or
new_date = date.subtract('hours',4);

using timezone-js. you can easily convert the time from one timeZone to another. timezone.js

var date_object;
function localize(t){
date_object=new Date(t+" UTC");
document.write(date_object.toString());
}
localize("4/24/2014 4:52:48 PM")
document.write(date_object.toString().replace(/GMT.*/g,""));
Demo