External calendars

Your tasks are not the only things that take up your time. Meetings, classes, and shared calendars do too, and planning around them is easier when they sit next to your tasks. Operon can show external calendars inside the Calendar, so your plan reflects your real day. These calendars are read-only: Operon displays their events, it does not change them.

Add a calendar

You add an external calendar as an ICS source: a calendar feed published as an .ics link. Operon accepts https, webcal, or direct .ics URLs, which most calendar services (and shared calendars) can give you. Each source has:

  • A name, shown in settings.
  • The ICS URL of the feed.
  • A color, so its events are distinct from your tasks.
  • A refresh interval, how often Operon re-fetches the feed.

Its events then render in the Calendar as timed or all-day blocks, the same shapes your tasks use.

MEDIA-DOCS-048-1: Adding an external calendar source with its ICS URL, color, and refresh interval.

MEDIA-DOCS-048-1 - External calendar source settings

Per-preset visibility

External calendars are shown per Calendar preset. Adding a source does not force it into every view; you enable it in the presets where you want it. So a focused work preset can stay task-only while a planning preset shows your meetings too. In sidebar mode, the Calendars section lets you toggle sources without opening settings.

Keeping it tidy

A source can hide created events: when an external event already has a matching task scheduled on the same day, Operon can hide the duplicate so you see one item, not two. Turn it off and both stay visible.

Refreshing

Operon re-fetches feeds on their refresh interval, and you can pull the latest at any time with Update External Calendars from the command palette.

FAQ

Can I edit external events in Operon? No. External calendars are read-only. Operon shows their events; it does not change the source.

Why don't my external events show up? Check that the source is enabled in the current preset, since visibility is per preset, and that the ICS URL is valid.

What calendars can I add? Any that publish an ICS feed, via an https, webcal, or .ics URL.

Settings

Operon settings for this live in Settings → Operon → Views → Calendar, in the External Calendars section, where you add sources and set each one's URL, color, refresh interval, and behavior. Per-preset visibility is set in the calendar presets.