Trying to represent date object in another timezone

Question

So basically I have a user enter a date and time for an event start. Later on the user picks a location and I want to display that same time but in a different timezone (For example if the user picks 5PM and picks New York as a location, the UTC date should be 5PM in New York 's timezone).

What I am doing right now is the following:

//utcDate is the date the user picked, I'm just extracting its date and time in this test string, I know this is not how I should parse the string but it is just for test purposes. It returns 2021-29-11 18:00:00. 
const zonedDateString = `${utcDate.getFullYear()}-${utcDate.getMonth()}-${utcDate.getDate()} ${utcDate.getHours()}:${utcDate.getMinutes()}0:00`
//newTimezone is America/New_York, zonedTimeToUtc is a function from date-fns-tz
const newDate = zonedTimeToUtc(zonedDateString, newTimezone) 
// The result for newDate is 2021-11-29T18:00:00Z

Any idea why this isnt working? It is basically just attaching a Z to the end of the string and not adapting it to the timezone.

*"the UTC date should be 5PM in New York 's timezone)."* a UTC date is in the UTC timezone. It can't be in Eastern Timezone and UTC timezone at the same time... — I wrestled a bear once., Dec 29 '21 at 14:17
Show your code for `zonedTimeToUtc()`. How do you expect us to help debug code that we can't see. — I wrestled a bear once., Dec 29 '21 at 14:18
Does this answer your question? [Convert date to another timezone in JavaScript](https://stackoverflow.com/questions/10087819/convert-date-to-another-timezone-in-javascript) — I wrestled a bear once., Dec 29 '21 at 14:19
@Iwrestledabearonce I wrote in the comment that it from the date-fns-tz library — user737163, Dec 29 '21 at 14:21
@Iwrestledabearonce I kind of meant to represent a UTC date that is 5PM with respect to New York's timezone and not the users current timezone. — user737163, Dec 29 '21 at 14:23
@Iwrestledabearonce https://github.com/marnusw/date-fns-tz#utctozonedtime The zonedtimetoutc example is what I am trying to achieve — user737163, Dec 29 '21 at 14:31

Trying to represent date object in another timezone

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