ToolNewFor Stargazers and landscape photographers

Sky Window

Know which nights are worth the drive.

Pick a place and date range to see sunrise, sunset, golden and blue hour, moon phase and moon-free dark hours, with the best nights shown on a calendar.

Download the source

Zip, 197 KB. MIT licence. Built 24 Oct 2026.

Live preview

Open the appOpen full screen
Loading the live site…

This is the real site, not a mock-up. Click around; the button on it opens the working app.

What you get

Everything a tool needs, already done.

Pages and screens

  • Launch page
  • Planner
  • Night calendar
  • Day detail
  • Night vision mode

Features

  • Sunrise, sunset, golden and blue hour times
  • Moon phase and moon-free dark hours
  • Best nights highlighted on a calendar
  • Works for any place and date range
  • Times computed in the browser from published formulas
  • Red-on-black night vision mode

Palette

  • #8a4a00
  • #f2b14c
  • #1a1000
  • #fbe7c6
  • #121a2e
  • #4a5470

Style

  • Dark
  • Editorial
  • Elegant
Sky Window on a phone
On a phone, as shipped.

For developers

A real codebase, not a page builder export.

Stack

Vite, React 19 and TypeScript for the app. The launch page is plain HTML, CSS and a little JavaScript with no build step. Vitest for unit tests, Playwright for browser tests.

Run it

unzip sky-window.zip
cd sky-window
npm install
npm run dev

In the zip

  • site/ the launch page with the built app in site/app/
  • src/ and e2e/ the app source and tests
  • docs/technical-docs/ architecture, runbook, quick reference
  • START-HERE.md and LICENSE (MIT)

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