Home▸Space & Astronomy▸Timezones: Earth's Rotation Visualized

Timezones: Earth's Rotation Visualized — Flat Map

A flat equirectangular map with a day/night terminator computed live from real solar-declination geometry and 24 idealized 15°-wide timezone bands — drag to pan, scroll to zoom, click to read any location's local time.

Space & Astronomy2DEasy60 FPS📱 Mobile-adapted⇄ 3D version

Details

CategorySpace & Astronomy

RenderingCanvas 2D

DifficultyEasy

Target FPS60

ControlsSliders for simulated time speed (hours/second) and day-of-year (sets solar declination/season), a play/pause/reset transport, a reference-timezone dropdown, drag-to-pan and scroll/pinch-to-zoom on the map, and click-to-select any point to read its live local time and idealized 15° timezone offset

timezonesearth-rotationday-night-cycleastronomynew-year

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The same real 15°-per-hour rotation that drives the 3D globe also underlies this flat equirectangular map, but the day/night terminator here comes from an independent per-pixel solar zenith-angle calculation rather than 3D lighting — pan and zoom across 24 idealized timezone bands and click any point to read its live local clock relative to a reference timezone.

⚙ Under the hood

A flat equirectangular map whose day/night terminator is computed per pixel from the real solar zenith-angle formula as simulated Earth-time advances, with 24 idealized 15° timezone bands you can pan and zoom across and click to read local time.

timezonesearth-rotationday-night-cycleastronomynew-year

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install