See Dawn in the calendar app you already use

You already have a calendar app. It is in your dock, on your lock screen, on your watch, and it reads your day out in the car. Dawn is not trying to replace that — it is the place your calendar is kept, and the app you already open is a perfectly good place to read it.

So point that app at Dawn once, and your Dawn events show up there alongside everything else, without opening Dawn at all.

Turn it on

Calendar → the calendar's name → "Let other calendar apps subscribe to this."

New calendars have this on already. One made before this existed may not, so tick it and press Save.

Underneath it you will find three ways in:

• Add to Apple Calendar — opens Calendar's subscribe sheet straight away. On a Mac it opens Calendar; on iPhone and iPad it opens the Calendar app.
• Add to Google Calendar — opens Google's own "add by URL" screen with the address already filled in. Press Add.
• The URL underneath — for Outlook, Fastmail, Thunderbird or anything else. Look for Subscribe, Add by URL, or From Internet.

What you get

Everything on that calendar, including the things Dawn put there for you:

• events you or Claude created
• todos you scheduled — a scheduled todo is written onto the calendar as a block, so it travels with the subscription
• flights — each leg of a booking is on the calendar too

A year of history comes across, and everything in the future.

Two things worth knowing

It updates on its own, but not instantly. A calendar app decides for itself how often to re-read a subscription. An hour is a common default and five minutes is usually the tightest you can set. So an event Claude adds while you are talking to it will not be in Apple Calendar the second it is saved.

On iPhone that setting lives under Settings → Apps → Calendar → Sync, and on a Mac under Calendar → Settings → Accounts → the subscription → Refresh Calendars.

It is read-only, on purpose. You can see Dawn's events in your calendar app; you cannot edit them there. Changes are made in Dawn, or by asking Claude, and they appear on the next refresh. That split is the useful one: the checking happens where checking already happens, and the writing happens where the rest of your context is.

The URL is a password

Anyone holding the subscription URL can read that calendar, forever, without signing in to anything. That is what makes it work in an app that has never heard of Dawn — and it is why the URL is only ever shown to the calendar's owner, and never to somebody it was shared with.

Treat it like a password. Do not put it in a shared document or a ticket.

If one does get out, press Reset address. The calendar gets a new one and the old one stops answering immediately. Note that unticking the box is not the same thing — that stops the feed answering while it is off, but the address is unchanged and works again the moment you tick it back on.

Resetting breaks every subscription there is, including your own, so you will need to add the calendar again in whatever apps were reading it.

To hand a calendar to a person, use Share underneath instead — that is an invitation to their Dawn account, and you can take it back.