Pluto Time Calculator Not Working? — Troubleshooting Guide

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1. Enable Browser Location Permissions

The calculator's "Use My Location" feature requires your browser to share your GPS coordinates. If you previously denied this permission, the button will fail silently or show an error.

How to re-enable:

Chrome: Click the lock/tune icon in the address bar → Site settings → Location → Allow
Firefox: Click the lock icon → Clear permissions → Reload the page
Safari: Preferences → Websites → Location → Find this site → Allow
Edge: Click the lock icon → Site permissions → Location → Allow

After updating the permission, reload the page and try again.

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2. Enter Coordinates Manually

If GPS-based geolocation isn't working — for example, on a desktop without GPS hardware — you can type your location directly. The calculator accepts:

City names — e.g., "London" or "Tokyo, Japan"
Latitude & longitude — e.g., "40.7128, -74.0060"
Addresses — e.g., "1600 Pennsylvania Ave, Washington DC"

If one format doesn't return results, try a different one. City name searches use a geocoding service that requires an internet connection.

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3. Polar Region Limitation

Pluto Time occurs when the Sun's elevation is approximately −1.5°. In polar regions during summer, the Sun may never dip below the horizon (midnight sun), which means it never reaches −1.5°. Similarly, during polar winter, the Sun stays well below −1.5° all day.

If you're at a high latitude (above ~65° N/S) and see a "no results" message, this is the likely cause. Try checking a date closer to the equinoxes (March or September) when the Sun crosses the horizon at all latitudes.

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4. Use a Modern Browser

The Pluto Time Calculator uses modern JavaScript features including the Geolocation API, Intl.DateTimeFormat, and ES2020+ syntax. Make sure you're using a recent version of:

Chrome / Edge 90+
Firefox 90+
Safari 15+
Samsung Internet 15+

Internet Explorer is not supported. If you're on an older browser, updating to the latest version should resolve most compatibility issues.

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5. Ensure JavaScript Is Enabled

The solar-elevation calculations run entirely in your browser using JavaScript. If JavaScript is disabled — via browser settings, a corporate policy, or an extension like NoScript — the calculator will not function.

To check: look for a "JavaScript blocked" icon in your address bar, or try visiting a known JS-dependent site. Re-enable JavaScript for this site and refresh.

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6. Clear Your Browser Cache

If you've visited before and the calculator behaves unexpectedly, a stale cache could be serving outdated JavaScript files. Try a hard refresh:

Windows / Linux: Ctrl + Shift + R

Mac: Cmd + Shift + R

Alternatively, open DevTools (F12) → Network tab → check "Disable cache" → reload the page.

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7. Try a Different Input Format

If typing a city name returns no results, the geocoding service may not recognize your spelling, or the city may be ambiguous. Try these alternatives:

Add the country — "Springfield, IL, USA" instead of "Springfield"
Use decimal coordinates — look up your location on Google Maps, right-click, and copy the lat/lng
Try the GPS button instead of manual entry

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8. Still Not Working?

If none of the above steps resolve your issue, we'd love to hear from you so we can investigate and fix the problem. Please include:

Your browser name and version
The location you entered
Any error messages you see
A screenshot if possible

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Try the Calculator Now

After applying the fixes above, give it another try right here.

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