Sunrise & Sunset Time Calculator
Find the exact sunrise and sunset times for any location and date by providing the Latitude and Longitude.
💡 Tip: Need coordinates? Search "latitude and longitude of [City Name]" on Google.
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Understanding Solar Time and Daylight Duration
The Sunrise and Sunset Time Calculator is based on precise astronomical modeling, providing data critical for professionals. The calculated times represent the moment the sun's center is 0.833 degrees below the horizon, an adjustment that accounts for atmospheric refraction. This high degree of accuracy is why geographic coordinates (Latitude and Longitude) are mandatory, as solar events change dramatically based on position, especially when nearing the poles.
In addition to dawn and dusk times, the tool calculates the Daylight Duration, which is the total time the sun is visible above the horizon. This metric is invaluable for fields like construction management, solar energy planning and determining the Golden Hour and Blue Hour for optimal landscape and portrait photography. Rely on this tool for definitive solar event scheduling for any location and day of the year.
Frequently Asked Questions (FAQs)
What does the 0.833 degree horizon angle mean?
The standard definition of sunrise and sunset is when the sun's upper limb is geometrically 0 degrees from the horizon. However, the atmosphere bends light (atmospheric refraction). The 0.833 degree angle is used to precisely account for this refraction and the sun's semi-diameter, so the time given is the moment the sun is actually visually crossing the horizon.
What happens if the sun doesn't rise or set (e.g. at the poles)?
In regions above the Arctic Circle and below the Antarctic Circle, the sun may remain above or below the horizon for a full day (or longer). If the API determines the sun does not rise or set on your chosen date/location, the result display will show "Polar Day" or "Polar Night" instead of a time.
How is the Daylight Duration calculated?
The Daylight Duration is simply the time difference between the calculated Sunset and Sunrise times. It represents the total length of time the sun is visually above the horizon for that specific date and location, providing a useful metric for comparing seasonal changes.