Calendar subscriptions

Settings → Assistant & API → Calendar feed. Ask for a link, copy it, and add it to your calendar as a subscription.

Two kinds of feed:

Yours	Everything with a due date that is on you, across every workspace you are a member of
A saved view	One saved view, resolved the way its share link resolves it

A task with no due date is not in the feed at all — there is nothing for a calendar to draw.

Subscribing, not importing

Import takes a snapshot and never updates. You want subscribe:

• Google Calendar — Other calendars → From URL
• Apple Calendar — File → New Calendar Subscription
• Outlook — Add calendar → Subscribe from web
• Thunderbird — New Calendar → On the Network → iCalendar (ICS)
• DAVx5 / Android — add a webcal subscription

The feed asks to be re-fetched hourly. Most clients treat that as a suggestion and pick their own interval, usually between a few minutes and a day, and none of them can be made to check more often than they want to. If something you just changed has not appeared, that is why.

Events or tasks

By default every entry is a VEVENT — an all-day entry on the day it is due — because a subscribed calendar is nearly always read by something that draws a grid, and every one of those ignores VTODO completely.

Add ?kind=todo to the URL for the other half: Thunderbird’s task list, DAVx5, anything that wants tasks as tasks. Add ?done=1 to include finished work.

Each entry carries the identifier and title, the description, a link back, the priority, the project as a category, and a status derived from the state’s group.

The URL is the password

There is no other check. Anybody holding the link can read the titles, descriptions and dates of everything in it. So:

• It does not exist until you ask for it. A feed that existed before anybody wanted one is a feed that can leak before anybody knew it was there.
• A new link kills the old one. New link writes a fresh token; every copy of the previous URL stops working from that moment, and every calendar subscribed to it stops updating and has to be re-added. The confirmation says so before it happens.
• Turn off removes it entirely.

What a feed can never do is widen what you can see. Every query runs as you, scoped to workspaces you are a member of — a token pointed at a view in somebody else’s workspace answers with nothing.

What it does not do

• No writing back. Ticking a task off in a calendar client changes nothing here. This is a read-only feed, not CalDAV.
• No times. Due dates in Kolibri are days, so every entry is all-day.
• No alarms. A VALARM would fire on your device on a schedule Kolibri did not choose; reminders live in notifications, where you can turn them off.
• No per-project feed. A saved view scoped to a project is the same thing with a name on it.