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Top 23 Python Calendar Projects
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oncall
Oncall is a calendar tool designed for scheduling and managing on-call shifts. It can be used as source of dynamic ownership info for paging systems like http://iris.claims. (by linkedin)
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atom
Atom Agent, automate your workflows by talking to an AI — and let it remember, search, and handle tasks like a real assistant (by rush86999)
Working on:
https://www.novopathmedical.com/ - evidence-based guidance of diet, exercise, and mental health via SMS for end users. Clinician-guided feedback to bots.
https://github.com/rush86999/atom - ai agent workforce. Harder than expected. There are so many issues with sync with 3rd party apps. Need to launch the first one, so this is getting put on the back burner. landing page: https://atomagentos.com/
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syncall
Bi-directional synchronization between services such as Taskwarrior, Google Calendar, Notion, Asana, and more
Project mention: Show HN: Saga – A Jira-like project tracker MCP server for AI agents (SQLite) | news.ycombinator.com | 2026-02-21https://agentskills.io/specification#skill-md-format
.
SWE bench involves solving GitHub issues.
Which of the SWE bench agents read from or write to GitHub issues?
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There could be a local cache of remote issues, and/or an overlayfs-like write cache
From https://github.com/GothenburgBitFactory/bugwarrior :
> bugwarrior - Pull tickets from github, bitbucket, bugzilla, jira, trac, and others into taskwarrior
https://github.com/bergercookie/syncall :
> Bi-directional synchronization between services such as Taskwarrior, Google Calendar, Notion, Asana, and more
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ditz:
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appointment
Invite others to grab times on your calendar. Choose a date. Make appointments as easy as it gets.
Project mention: Cal.diy: open-source community edition of cal.com | news.ycombinator.com | 2026-04-21Thunderbird showed up in the last thread: https://github.com/thunderbird/appointment
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open-web-calendar
Embed a highly customizable web calendar into your website using ICal source links
For Release 0.4, I decided to work on adding category-based event filtering to the Open Web Calendar project. This feature will let users filter events by category using checkboxes, which makes the calendar easier to navigate when there are many different types of events.
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gaia
Your proactive personal AI assistant & companion for daily productivity 🌎 (by theexperiencecompany)
Project mention: Show HN: Gaia – open-source, Proactive AI assistant to manage your digital life | news.ycombinator.com | 2026-02-15 -
notion-gcal-sync
A Python script to automate the syncing of tasks between Google Calendar and the all-in-one productivity workspace, Notion. It utilizes API and is customizable for your own needs. Free to use.
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Project mention: Show HN: Calgebra – Set algebra for calendars in Python | news.ycombinator.com | 2026-01-04
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nepali-datetime
Python's core datetime inspired Bikram Sambat (BS date) & Nepal Time (NPT) package🇳🇵
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nextmeeting
nextmeeting - Show your google calendar or caldav next meeting in your waybar or polybar (by chmouel)
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Python Calendar discussion
Python Calendar related posts
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Khal – CLI Calendar App
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Show HN: Atom – open-source AI agent with "visual" episodic memory
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Stop Thinking of AI as a Coworker. It's an Exoskeleton
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Show HN: Atom – Safer Version of OpenClaw with Episodic Memory
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Building a CLI Tool with Cognee: Lessons from 5 Epics
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Show HN: Atom – The Open Source AI Workforce and Multi-Agent Orchestrator
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Release 0.4- Planning
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A note from our sponsor - SaaSHub
www.saashub.com | 21 Jun 2026
Index
What are some of the best open-source Calendar projects in Python? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | khal | 3,021 |
| 2 | calcure | 2,294 |
| 3 | python-o365 | 1,912 |
| 4 | holidays | 1,896 |
| 5 | vdirsyncer | 1,837 |
| 6 | oncall | 1,251 |
| 7 | pandas_market_calendars | 974 |
| 8 | aiogram_dialog | 897 |
| 9 | atom | 761 |
| 10 | google-calendar-simple-api | 683 |
| 11 | syncall | 610 |
| 12 | appointment | 489 |
| 13 | fb2cal | 438 |
| 14 | django-formset | 434 |
| 15 | open-web-calendar | 323 |
| 16 | july | 275 |
| 17 | flask-calendar | 229 |
| 18 | gaia | 215 |
| 19 | notion-gcal-sync | 143 |
| 20 | plotly-calplot | 130 |
| 21 | calgebra | 98 |
| 22 | nepali-datetime | 67 |
| 23 | nextmeeting | 55 |
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