Question 1

How does this calculate times?

Accepted Answer

It uses a simplified astronomical algorithm to determine the sun's position relative to your GPS coordinates and date.

Question 2

Is my location data sent to a server?

Accepted Answer

No. All calculations happen entirely within your browser on your device.

Question 3

How accurate is this?

Accepted Answer

The simplified algorithm is accurate to within ~1-2 minutes for most locations. It accounts for the equation of time and solar declination.

🌅 Sunrise & Sunset Calculator

❓ Frequently Asked Questions