Time zone conversion for Slack
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Channel Time

Automatic time zone conversion for Slack


To simply use this for your Slack team, visit https://channeltime.info


To work on this app you'll need to create a Slack app at https://api.slack.com/apps

Provide the Slack app client ID and secret.

Create a slash command and note the verification token.

Set these environment variables on your machine:

  • SLACK_CLIENT_ID: Slack app client ID
  • SLACK_CLIENT_SECRET: Slack app client secret
  • SLACK_SLASH_TOKEN: slash command verification token
  • PORT: HTTP server port

The database is MongoDB, so you'll need to install it for your machine.

Install dependencies npm install

Run the server npm start

The easiest way to test on your machine before pushing to production is to use https://ngrok.com, a secure tunnel service.

ngrok http 3000 will give you a tunnel from a public URL such as https://77ab8d40.ngrok.io to http://localhost:3000

You can then use the public HTTPS endpoint in your Slack app:

Start the process of adding a team by visiting https://77ab8d40.ngrok.com/slack/login

To run to production: Find a host, set your domain name, set the environment variables, deploy your code and run the app on boot.


The static HTML part of Channel Time is actually served statically by Nginx and generated through Middleman, a Ruby static site generator. It would be best to just bite the bullet, figure out how Gulp works and put everything in a single application.

Static portion of the site: https://github.com/monkbroc/channeltime-web


Copyright 2015 Julien Vanier

Licensed under the GNU Affero GPL