Serves /bank-holidays and /when-do-the-clocks-change on GOV.UK
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thomasleese Merge pull request #336 from alphagov/dependabot/bundler/govuk_fronte…

Bump govuk_frontend_toolkit from 7.5.0 to 7.6.0
Latest commit f7ca423 Jul 19, 2018


Serves calendars in a clear and accessible format, along with JSON and iCal exports of the data.



Live examples


  • scope: sach type of calendar (eg daylight saving, bank holidays) is known as a scope. A scope has its own view templates, JSON data source and primary route.

Technical documentation

This is a Ruby on Rails application that serves static pages based on JSON files. It does not use a database.

JSON data files are stored in lib/data/<scope>.json, with a divisions hash for separate data per region (united-kingdom, england-and-wales, scotland or northern-ireland).

Each scope's data file contains a list of divisions, containing a list of years, each with a list of events:

  "title": "UK bank holidays",
  "description": "UK bank holidays calendar - see UK bank holidays and public holidays for 2012 and 2013",
  "divisions": {
    "england-and-wales": {
      "title": "England and Wales",
      "2011": [{
        "title": "New Year's Day",
        "date": "02/01/2011",
        "notes": "Substitute day"

The division title attribute is optional. If this is not present the slug will be humanized and used instead.


Additional information

Publishing to GOV.UK

  • bundle exec rake publishing_api:publish will send the calendars to the publishing-api.

Search indexing

  • Is performed automatically on data sent to publishing api.

Generate bank holidays JSON

A rake task has been created to generate the bank holidays JSON for a given year. They need to be then inserted, and modified to take into account any additions/modifications made by proclamation. Run the rake task like this:

bundle exec rake bank_holidays:generate_json[2016]

Canonical sources

Running the application

When you are in Development:

bundle exec bowl calendars www

Or locally:

./ --live

You can also run ./ to run against a local running content-store and ./ --dummy for the dummy content-store.

Running the test suite

bundle exec rake


MIT License