Daylight collects nothing

The short version

Daylight does not collect anything. Nothing you write in it is sent to us, because there is nowhere for it to be sent — we run no server that receives user data.

What is stored, and where

Everything Daylight keeps lives on your own device, or in your own browser or Apple account.

Browser extension. Your settings — interface language, colour scheme, calendar type, whether lunar dates and week numbers are shown, and which holiday calendars you subscribed to — are stored with your browser's own extension sync. If you have browser profile sync turned on they follow your profile; that is your browser's service, not ours. Your date marks, diary entries and todos are stored locally on that device only, and are never synced. Downloaded holiday dates are cached locally so the calendar works offline.

macOS app. Settings, diary entries and todos are stored in the app's own storage on your Mac. If you turn on system calendar integration, the app reads your calendars through Apple's EventKit to show your events — it only ever reads, and never writes to, uploads, or copies them. If you open the 3D moon view, your location is used on-device to compute where the moon sits in your sky and is never uploaded. An approximate position (to about 3 km) is kept on your Mac for up to 7 days so the view opens without waiting, and it is deleted when you turn location access off. You can turn calendar or location access off at any time in System Settings › Privacy & Security.

What leaves your device

Public holiday downloads are made for the regions you subscribe to:

• holidays.mings.work — our own feed of mainland China statutory holidays
• www.1823.gov.hk — the Hong Kong SAR government's official calendar
• www.officeholidays.com — Thailand public holidays (browser extension)
• any calendar (.ics) address you paste in yourself

The website edition of the macOS app also requests update information and installers from daylight.mings.work. The Mac App Store edition receives updates through Apple and does not include the website updater. These requests do not upload your diary, system calendar events, or location.

Nothing is downloaded until you subscribe. After that, the macOS app refreshes your subscribed calendars once a day or once a week, as you choose in its settings.

These are ordinary downloads. Nothing about you is included beyond what any web request necessarily reveals to the site being contacted — your IP address, and the fact that a request was made. The third-party sources above are contacted directly by your device; we neither see nor log those requests. Our own feed, holidays.mings.work, is hosted on Cloudflare Pages; we add no logging of our own, and Cloudflare handles each request, including your IP address, only to deliver the file.

Lunar dates, the 24 solar terms and moon phases are computed on your device and involve no network request at all.

What Daylight does not do

• No analytics, no telemetry, no crash or error reporting
• No advertising, and no advertising or tracking SDKs
• No accounts, no sign-in, no user identifiers
• No selling or sharing of data, because none is collected
• No remotely-loaded code — everything that runs ships inside the package

Removing your data

Uninstalling the extension removes everything it stored in your browser. Deleting the macOS app and its data removes everything it stored on your Mac. You can also delete individual diary entries and marks inside either client at any time, and the macOS app can export your diary as JSON if you want a copy first.

Children

Daylight is a calendar. It collects nothing from anyone, including children.

Changes

If this policy changes, the date at the top changes with it.

Contact

[email protected]

Daylight is open source under GPL-2.0, so any claim on this page can be checked against the source rather than taken on trust.