Sun & Timezone Finder

Plan around daylight anywhere with fast, on-device solar calculations.

Enter latitude and longitude, choose a date, and Sun & Timezone Finder calculates:

• Sunrise, solar noon and sunset

• Day length

• Civil, nautical and astronomical twilight

• A complete month overview with the longest and shortest days highlighted

Use built-in location presets for quick checks, or enter coordinates for anywhere in the world. Save a scenario to keep its complete coordinates and date, then tap Load whenever you want to restore the form and recalculate its results.

The Timezone tab provides a likely timezone and UTC offset based on longitude. This is a practical estimate and can differ from official timezone boundaries or local daylight-saving rules.

Additional features:

• Copy calculated results when you need them elsewhere

• Home-screen widget for sunrise and sunset at your last-used coordinates

• Light, dark and system themes

• English, Simplified Chinese and Traditional Chinese interfaces

Core solar and timezone calculations run on your device. No account is required.