The Calendaring & Scheduling Consortium

Welcome to CalConnect

We are a non-profit partnership between developers, vendors and users of collaboration tools.

CalConnect For...

Whether you're a developer, product manager, or standards professional, CalConnect has resources for you.

Implement calendar standards in your applications with our comprehensive documentation and tools.

Ensure your products meet industry standards and achieve seamless interoperability.

Shape the future of calendaring standards by participating in our technical committees.

Stay up to date with CalConnect news and announcements.

May 11, 2026

The CalConnect Developer’s Guide at devguide.calconnect.org has been refreshed with the new CalConnect theme, featuring a modern design, dar...

July 08, 2025

The passing of Dave Thewlis on June 17, 2025.

January 09, 2023

On the occasion of his recent retirement, we pay tribute to Dave for his very special contributions as a founder and Executive Director of the Cal...

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