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Grant
Fund: NGI0 Commons Fund
Start: 2026-08
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NGI0 Commons Fund

Python Web Calendaring Ecosystem

iCalendar, CalDAV, and JMAP in Python

The Python calendaring ecosystem is a collection of open source libraries that implement the iCalendar, CalDAV, and JMAP standards for reading, writing, and synchronizing calendar data. Calendaring applications that depend on the Python calendaring ecosystem can create alarms, schedule one-time or recurring events, invite attendees, and perform other calendaring tasks. In this project several new libraries will be introduced - for JMAP calendar support, protocol-agnostic sync, and Django integration. Together the packages icalendar, python-caldav, recurring-ical-events, and open-web-calendar form the foundation of calendar support for a broad range of Python applications.

Run by PyCal

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This project was funded through the NGI0 Commons Fund, a fund established by NLnet with financial support from the European Commission's Next Generation Internet programme, under the aegis of DG Communications Networks, Content and Technology under grant agreement No 101135429. Additional funding is made available by the Swiss State Secretariat for Education, Research and Innovation (SERI).