Calendar

Overview

Calendar is a calendar program, available on Linux.

Features described in its Flathub listing and on its official website: sync across devices.

Services and protocols mentioned: CalDAV, WebDAV and Nextcloud.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

At a glance

All of Calendar is free: no feature is locked behind a paid plan, and its code is open.

Its licence (GPL-3.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

About

GNOME Calendar is an elegant tool to help you plan and stay on top of your schedule for upcoming days and weeks, whether your months are filled with meetings and appointments, public events, travel logistics, or other commitments in your life. Easily create and manage unlimited calendars and events with GNOME Calendar's infinite scrolling month view, week timetable, and scheduling list view. Integrating the latest GNOME technologies and design best practices, GNOME Calendar builds on top of the mature Evolution data server to manage large quantities of events and to provide integration with other applications. You can add calendars from various online calendaring services (like NextCloud, Google Calendar, and CalDAV / WebDAV servers), enabling you to synchronize your events across multiple devices and platforms. GNOME Calendar also supports local and offline calendaring, so you can use it anywhere and anytime while travelling (or after civilization's collapse.)

Description from Flathub — AppStream (Flathub)