Calendar GitHub Repositories (2026) · Open Source Tools

iCal-creator for PHP

📆 Calendar app for Nextcloud

The keyboard calendar. Fast & simple.

Gesture-driven, virtualized month / week / day calendar and date picker for React Native and the web.

The open-source, self-hosted family organizer. Keep full control of your family's data : run it on your own server.

Provides event calendar for your Symfony project. Compatible with API like Google Calendar.

perpetual Jewish Calendar with holidays, Shabbat and holiday candle lighting and havdalah times, Torah readings, and more

Build a Calendar By Pure SwiftUI

Calendar from Dux Labs

Pin a live Outlook calendar, inbox, tasks or any folder to your Windows desktop. Free since 2005, with 1.2M+ downloads.

A PHP script / API endpoint that will generate the Roman Catholic liturgical calendar for any given year, calculating the mobile festivities and the precedence of solemnities, feasts, memorials...

Home calendar card for HA

Simple iCal parser for PHP for parsing format into array

Tasks and calendar for GNOME, kept in your Nextcloud over CalDAV, with a GNOME Shell extension

Leightweight windows calendar app

Minimal calendar widget

WebCalendar is a PHP application used to maintain a calendar for a single user or an intranet group of users. It can also be configured as an event calendar.

Your day, at a glance

📆 icalendar library, in Rust of course - for fun

Group Office groupware and CRM