Golden Hour Calculator
Find golden hour, blue hour, sunrise, and sunset times for any location and date by entering your coordinates and time zone. Ideal for planning outdoor and landscape photography sessions.
About this calculator
Solar noon — the moment the sun peaks in the sky — forms the backbone of all daily sun-time calculations. A close approximation is: solarNoon = 12 + timeZoneOffset + (longitude / 15) − 0.25 × sin(2π × (dayOfYear − 81) / 365.25), where longitude / 15 converts degrees to hours and the sine term is the equation of time correction. Sunrise and sunset are then found by computing the hour angle using the sun's declination at the given latitude: hourAngle = arccos(−tan(latitude) × tan(declination)). Golden hour spans roughly 1 hour after sunrise and 1 hour before sunset, when the sun sits below 6° elevation and casts warm, diffuse light. Blue hour occurs when the sun is between −4° and −6° below the horizon, producing the cool, even tones favored in cityscape photography. Precise results require iterative astronomical algorithms, but this formula gives a practical approximation within a few minutes.
How to use
Say you are in Denver, Colorado (latitude 39.7°, longitude −104.9°) on March 21 (day 80), UTC−7. First calculate solar noon: 12 + (−7) + (−104.9 / 15) − 0.25 × sin(2π × (80 − 81) / 365.25) ≈ 12 − 7 − 6.99 − 0.25 × sin(−0.017) ≈ −1.99 + 0.004 ≈ 12:00 local time. The sun's declination on day 80 is near 0°, so the hour angle is arccos(−tan(39.7°) × tan(0°)) = arccos(0) = 90° = 6 hours. Sunrise ≈ 06:00, sunset ≈ 18:00. Golden hour runs 06:00–07:00 and 17:00–18:00 local time.
Frequently asked questions
What is golden hour in photography and why is it the best time to shoot?
Golden hour refers to the period shortly after sunrise and shortly before sunset when the sun is low on the horizon. At this angle, sunlight travels through more atmosphere, scattering blue wavelengths and leaving warm reds and oranges. The light is also more diffuse, reducing harsh shadows and producing flattering illumination on portraits and landscapes. Most professional outdoor photographers plan their shoots specifically around these windows to achieve that characteristic warm, cinematic look.
How is blue hour different from golden hour for photography lighting?
Blue hour occurs when the sun sits just below the horizon (roughly −4° to −6°), after sunset or before sunrise. Rather than the warm tones of golden hour, blue hour delivers a cool, even ambient light with no direct sun. This makes it ideal for cityscapes, architecture, and long-exposure photography where you want an illuminated sky balanced with artificial street or building lights. The window typically lasts only 20–40 minutes, so planning with a calculator is essential.
How accurate is a golden hour calculator based on latitude and longitude?
A solar position calculator based on latitude, longitude, day of year, and time zone is typically accurate to within a few minutes for practical photography planning. The main sources of error are the simplified equation-of-time correction, ignoring atmospheric refraction (which lifts the apparent sun about 0.57° near the horizon), and daylight saving time if not accounted for in the UTC offset. For critical scientific work, full VSOP87 planetary models are used, but for planning a photo shoot, the simplified approach is more than sufficient.