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Holibase

Public and school holidays as open data. For developers, calendars and everyone who plans.

Year
Since 2025
Role
Developer & operator
Services
API, website, iOS app
Link
holibase.org ↗
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S.01 · The challenge

Dates everyone needs, but no one offers cleanly.

Public and school holidays are scattered across ministry and authority websites, often as PDFs. Anyone who needs them in an app or calendar types them up by hand or pays for a data service.

S.02 · The approach
  1. Open API on Cloudflare Workers with Supabase as the database.
  2. Website holibase.org as a reference for everyone who doesn’t code.
  3. iOS app in Apple’s current Liquid Glass design.
  4. Non-profit and open: the source code is on GitHub.
S.03 · Holibase at a glance
€0cost for users
3channels: API, website, iOS app
Open Sourcecode public on GitHub
S.04 · Gallery
[API docs]
[holibase.org]
[iOS app]