A time zone console with an interactive 3D globe. Track multiple cities, scrub through time, and find meeting times across time zones — all synchronized to NIST atomic time.

• 3D Globe — Three.js-rendered Earth with day/night shading, city markers, and great-circle arcs
• Multi-city tracking — Add, remove, and reorder locations with live local times
• Time scrubbing — Drag the timeline or click a time to manually set any moment
• NIST time sync — Server-side NTP sync with time.nist.gov for accurate wall-clock time
• Day/night detection — Solar position calculated from subsolar point for each city
• Copy to clipboard — Export all city times in a formatted meeting-time block
• Customizable display — Accent colors, globe render styles (borders/wire/solid), font pairs, and texture intensity
• Responsive sidebar — Resizable panel with persistent width via localStorage

npm install
npm run dev

Open http://127.0.0.1:5173.

globetime/
├── server/
│   ├── index.js          # HTTP server, Vite dev middleware, API routes
│   └── nistTime.js       # NTP client for time.nist.gov
├── src/
│   ├── data/
│   │   ├── cities.js     # City database (name, lat/lon, tz, country)
│   │   └── timeutil.js   # Time formatting, solar position, date math
│   ├── App.jsx           # Main UI: header, sidebar, timeline, settings
│   ├── globe.js          # Three.js globe controller (shaders, markers, arcs)
│   ├── liveTime.js       # Display instant resolver (live vs manual)
│   ├── locationLabels.js # Country code display helpers
│   ├── nistTime.js       # Client-side NIST sync with offset calculation
│   ├── sidebarSize.js    # Sidebar width persistence and clamping
│   ├── styles.css        # All application styles
│   └── main.jsx          # React entry point
├── test/                 # Vitest test files
├── index.html            # HTML shell
├── vite.config.js        # Vite + Vitest configuration
└── package.json

• Drag the globe to rotate; it auto-rotates when idle
• Click a city row to anchor the timeline to that location
• Click a time value to edit it manually (switches to manual mode)
• Drag the timeline to scrub through the day in 5-minute increments
• Use the date controls to jump forward/backward by day or pick a specific date
• Press NOW to return to live NIST-synced time
• Press COPY to copy all city times to clipboard