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Dux Calendar

Dux Calendar is a calendar program, available on Linux.

  • Completely free
  • Linux
  • Open source

At a glance

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

Its licence (MIT) is a permissive open source licence: use, modification and redistribution are allowed, including in commercial projects.

Strengths

  • Open source code
  • Commercial use allowed

About

Dux Calendar is a standalone calendar app for the modern Linux desktop with a Material Design 3 inspired UI. It brings your Local, Google, Microsoft, CalDAV, and iCloud calendars together in one place. It runs as a lightweight daemon with a tray icon, keeps your accounts in sync, and reminds you about events. It's one of the first to be built with Quickshell, Qt6, and Go. You can optionally pair it with Dux Shell (DMS) for a more integrated and streamlined experience.

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) —
  • Facts collected from Official plan pages (pricing, licence, terms) (commercial use) —
  • Last technical check: 6 November 2026
  • Description from Flathub — AppStream (Flathub)

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