License
The core engine (calendaryjs) is licensed under the
PolyForm Noncommercial License 1.0.0.
It is free for any noncommercial purpose — personal projects, research, study,
hobby and amateur work, religious observance, and use by nonprofits, schools, or
government.
The official plugins (lunar, hijri, liturgical, ics) are MIT-licensed.
They require the core to run, so commercial use of the combined work still needs a
commercial license for the core.
Commercial use
Section titled “Commercial use”Commercial use requires a commercial license. Commercial use includes running calendaryjs in or for a product, service, or revenue-generating site — including ad-supported sites and internal business tooling.
How to get a license
Section titled “How to get a license”- Email license@calendaryjs.dev with: your company, what you’re building, how calendaryjs is used, and rough scale (team size / number of products / deployment).
- You’ll get a quote and a short license agreement.
- On agreement + payment, you receive the signed commercial license. You keep using the same npm package — the license is the legal grant, not a different build.
Contact
Section titled “Contact”- Commercial licensing — license@calendaryjs.dev
- Anything else — contact@calendaryjs.dev