The icalendar package is a RFC 5545 compatible parser/generator for iCalendar files.

icalendar is a critical project used by many. It has been there for a long time and maintaining long-term compatibility with projects conflicts partially with providing and using the features that the latest Python versions bring.

Since we pour more effort into maintaining and developing icalendar, we split the project into two:

• Branch 4.x with maximum compatibility to Python versions 2.7 and 3.4+, PyPy2 and PyPy3.
• Branch master with the compatibility to Python versions 3.7+ and PyPy3.

We expect the master branch with versions 5+ receive the latest updates and features, and the 4.x branch the subset of security and bug fixes only. We recommend migrating to later Python versions and also providing feedback if you depend on the 4.x features.

• icalevents. It is built on top of icalendar and allows you to query iCal files and get the events happening on specific dates. It manages recurrent events as well.
• recurring-ical-events. Library to query an ICalendar object for events happening at a certain date or within a certain time.
• x-wr-timezone. Library to make ICalendar objects and files using the non-standard X-WR-TIMEZONE compliant with the standard (RFC 5545).