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Bhavesh Kasturi
Bhavesh Kasturi

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Time Zone issue with Heroku

I've been using Heroku for a while now, Recently I was working on a project which was a basic chat application, It was built with Nodejs,, momentjs.

As it was a chat application I used momentjs for the timestamps on the messages, Everything was working fine locally, but when I deployed my app on Heroku I found that messages were not showing the correct time.

As the Heroku's default region is set to US & I was from India that was causing the issue. So basically momentjs was showing US Timezone.

So the problem was with Heroku's Timezone & Luckily Heroku allows us to change the timezone of our app just by simply adding a new config var.
After fixing the problem it was working fine :)

Here's the Solution:

Heroku Dashboard - Website

1- Login into the Heroku from a browser
2- Select your app
3- Go to the setting tab
4- Press "Reveal Config vars" button
5- Set the keys to "TZ" and value of your timezone (Eg: Asia/Kolkata)
6- Press the add button

Heroku CLI

1- Open your Command shell
2- Login into Heroku
3- cd into your App directory
4- Setup TZ

heroku config:add TZ="Asia/Kolkata"
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What is correct TZ value of your country ?

You can find your country's TZ value from this wiki page

India uses a single time zone for the whole country.
I looked on the Wiki page List of tz database time zones, but I was unable to find an entry for India.

If you can't find your country's TZ follow this link

Thanks for reading!

Top comments (2)

duhbhavesh profile image
Bhavesh Kasturi

Glad it helped :)

Timeless DEV post...

Git Concepts I Wish I Knew Years Ago

The most used technology by developers is not Javascript.

It's not Python or HTML.

It hardly even gets mentioned in interviews or listed as a pre-requisite for jobs.

I'm talking about Git and version control of course.

One does not simply learn git