Sunrise Calendar
Microsoft bought one of the most admired mobile calendars, moved its design and integrations into Outlook and made the original app stop working.
Quick facts
- Existence state
- Officially Gone
- Peak stage
- general availability
- Research confidence
- high
- Last verified
What it was
A formally released cross-platform calendar application created by Sunrise Atelier.
Sunrise combined multiple calendars with weather, social profiles, event services and a clean two-pane interface.
Existence timeline
The calendar app reaches iPhone and the web.
Android, desktop and third-party services join.
The team enters the Outlook organisation.
Microsoft says the standalone app will eventually close.
Sunrise is removed from app stores.
The independent calendar service ends.
Why it ended
Microsoft closed the app in September 2016 after integrating parts of the team and product into Outlook Mobile.
Last confirmed trace
Screenshots, app packages, user exports and Outlook features preserve its design lineage.
What it left behind
Sunrise became a frequently cited example of a successful app disappearing after an acquisition despite influencing its buyer.
How we classified it
The archive unit reached normal public release or operation and is no longer obtainable in its original public form.
Verified normal public availability maps to 100 under Arrival Score V1.
Sources & verification
Last reviewed 2026-08-01. Sources are linked so readers can inspect the evidence directly.