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What's new in Tymeslot 1.3: a fuller calendar, Apple iCloud, and open source

Luka Breitig — Software Engineer & AI Developer
Luka Breitig

1 July 2026 · 4 min read

What's new in Tymeslot 1.3: a fuller calendar, Apple iCloud, and open source

Tymeslot 1.3 pulls on two threads at once. The calendar that has quietly sat inside Tymeslot for a while now does enough that you can run your day from it. And the code underneath the whole thing is now open source. Here is what changed.

The calendar you already had, now worth living in

Tymeslot has had a calendar for a while: a month, week and day grid that shows your synced events, lets you create and edit them, and drag them around. It worked, but it was a viewer with a few edges. If you wanted to set a repeating event, add a reminder, or find last Tuesday's call, you went back to whichever calendar app you came from.

1.3 closes most of those gaps, so the calendar earns its place instead of sending you elsewhere. What you can do now that you couldn't before:

  • Create and toggle all-day events, not just see them when they arrive from a sync.
  • Build a repeating event from scratch — daily, weekly, monthly, with an end date — and edit the rule afterwards, rather than only being prompted when you move one that was already recurring.
  • Give any event its own colour, on top of the colour each synced calendar already gets, so a glance tells you what kind of day it is.
  • Set a reminder that travels with the event: Tymeslot writes it back to the calendar you synced from, so the alert fires wherever you already look.
  • Get a browser desktop notification before an event starts, if you keep Tymeslot open in a tab.
  • Add an event by typing it as a single line of text instead of filling in a form.
  • Search your events instead of scrolling to find one.
  • Switch to an agenda view when a list suits the day better than a grid.
  • Jump to any date with the mini-month picker in the toolbar.
  • Learn the keyboard shortcuts from a help overlay and keep your hands off the mouse.

None of this asks you to move your life into Tymeslot. It syncs with the calendar you already keep. It just means the trip out to that calendar is now optional.

Now with Apple iCloud

Tymeslot already synced with Google, Outlook and CalDAV servers. 1.3 adds Apple iCloud to the list. Connect an iCloud calendar and it feeds the same grid, and events you create in Tymeslot sync back the same way. If your appointments live in Apple's calendar, they no longer have to live apart from your booking availability.

Connecting an Apple iCloud calendar in Tymeslot with an app-specific password

Tymeslot is now open source

The bigger change in 1.3 is not something you click. Tymeslot's code is now licensed under the GNU Affero General Public License v3 (AGPLv3), replacing the Elastic License 2.0 it shipped under before.

For most people booking a meeting, nothing changes. For anyone who wants to run Tymeslot themselves, it changes the terms entirely: you can now use, study, modify and redistribute the self-hosted app under a licence the Open Source Initiative recognises, with the usual AGPL condition that changes you deploy as a service go back to the community. The managed service at tymeslot.app carries on as before.

We wanted Tymeslot to be something you can own, not just rent. This is the step that makes that real.

A better first five minutes

Setting up used to mean picking a theme after you had already finished onboarding, more or less on faith. 1.3 moves the choice into onboarding and shows a live preview of your booking page as you go, so you see what visitors will see while you are still setting it up rather than after.

Choosing a booking-page theme during onboarding, with a live preview of the booking page alongside

Also in 1.3

A few smaller things came along with the release:

  • The WordPress plugin is now listed on WordPress.org, and the embed settings link straight to it.
  • Recurring and all-day events keep the right times across daylight-saving changes, including weekly events set to repeat on particular weekdays.
  • All-day repeating events now stop on their end date instead of running past it.
  • CalDAV events with unfamiliar timezones are read at the correct time.
  • Guests who have already declined an invitation no longer get emailed every time the event is edited.

The full list is on the changelog. As always, tell us what you want next.

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