CALCULATED SUNSET
—
Preparing your evening…
Start watching—
+10 min checkpoint—
Stay through—
FIELD PHOTO · MORGAN HILL, OCT 2, 2026
YOUR EVENING
Stay for the color.
Will it be a good one?
A quality forecast is the next research step. This draft calculates when to watch; it doesn’t yet predict how colorful the sky will be.
See how the satellite method worksKeep tonight’s sky.
A photo and your rating turn an evening into an observation.
Saved privately on this deviceYOUR VIEWING PLAN
Sunset isn’t the finish.
Stay through the next 15 minutes. Around +10 minutes is a useful checkpoint from our Morgan Hill observations, not a guaranteed peak.
Look toward—
Observe atSunset · +5 · +10 · +15
Times assume a level horizon. Hills and buildings can hide the sun earlier. The photo above is from the field study, not tonight’s weather.
A LITTLE MORE EVIDENCE, EVERY EVENING
Your sunset journal.
Your photos, your impression, the moment you caught it. Multiple frames from one evening share one rating.
The original Morgan Hill field study 9 evenings · 15 photos
Confirmed research observations. These are separate from the personal entries you add on this device.
Explore all of the study photographs ↗SMALL STEPS TOWARD A BETTER HEADS-UP
A companion for the sky.
A HEADS-UP BEFORE SUNSET
Sunset reminders
Get a daily reminder while the app is closed. These are timing reminders for the demo; quality predictions are still in development.
Checking notification support…
On iPhone, add this app to your Home Screen and open it there first. Enabling reminders saves this device’s notification connection, place name, time zone, and approximate location on Cloudflare. Photos and notes stay on your device. Reminders respect quiet hours from 10 PM to 8 AM at your chosen location. Connections expire after six months unless you save settings again.
Put it on your Home Screen.
On iPhone, open this website in Safari, choose Share, then Add to Home Screen. On Android, use your browser’s Install app or Add to Home screen option. The app shell can work offline after the first visit.
Checking offline support…
Your journal stays here.
Photos and notes are saved in this browser on this device. They are not uploaded to a server in this draft. Clearing website data can remove them.
Back up an evening’s originals and its metadata from the journal. Changing the website address does not transfer your journal.
A prediction worth trusting.
Connect the existing satellite pipeline, then test quality and viewing-window predictions made one and two hours ahead. Keep low-confidence or missing-data evenings visible.
Capture. Sync. Get a heads-up.
Opt-in sunset reminders are available above. Private photo uploads and forecast notifications are the next steps. Travel support will need suitable satellite coverage and regional testing.
Sunset planning uses SunCalc 1.9.0. Research annotations use Astral. Photo metadata is read locally with exifr 7.1.3. SunCalc license · exifr license · HEIC decoder and source