Use the sunrise sunset calculator to estimate sunrise, sunset, solar noon, day length, and civil, nautical, and astronomical twilight times for any latitude.
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Sunrise sunset calculator for coordinates, day length, and twilight Use this sunrise sunset calculator to estimate sunrise, sunset, solar noon, day length, and civil, nautical, and astronomical twilight for any latitude, longitude, and date, then convert the result into a real local clock time for the place you care about.
Quick presets
How the clock display works
Latitude, longitude, and date determine the Sun’s geometry. The timezone selector converts those sunrise, sunset, twilight, and solar-noon events into the legal local clock time you would actually use for planning, so remote locations should usually use their destination timezone.
Enter location and date Latitude and longitude start at the neutral 0,0 reference. Choose a preset, use your current location, or enter coordinates and a date to calculate sunrise, sunset, twilight, solar noon, and day length.
Sunrise sunset calculator guide: solar noon, day length, twilight bands
Use this sunrise sunset calculator to estimate sunrise, sunset, solar noon, day length, and the civil, nautical, and astronomical twilight bands for any latitude, longitude, and date.
What a sunrise sunset calculator tells you
A sunrise sunset calculator estimates when the Sun crosses the horizon for a chosen date and set of coordinates. It also shows solar noon, total daylight duration, and the twilight bands before sunrise and after sunset. That makes it useful for travel planning, outdoor work, photography, astronomy, and everyday schedule decisions tied to daylight.
For pages like this one, the core question is not just when the sun rises or sets. It is how the whole daylight window behaves: how long the day is, how much usable light exists before sunrise or after sunset, and how the result changes when latitude and season change.
How sunrise and sunset are calculated
A simplified sunrise and sunset calculation uses the date, latitude, and longitude to estimate solar declination, the equation of time, and the solar hour angle needed for horizon crossing. Practical sunrise and sunset pages usually treat sunrise and sunset as the moment when the Sun's centre is slightly below the true horizon in order to account for refraction and the apparent size of the solar disc.
That means the result is not just a raw geometric crossing. It is a practical approximation of when the visible sunrise and sunset event occurs for a location. This is why a credible calculation of sunrise and sunset explains both the coordinates and the model assumptions.
Sunrise / sunset uses a standard apparent-sun zenith of about 90.833°
This common assumption accounts for atmospheric refraction and the apparent solar disc radius.
Solar noon ≈ the midpoint of the daily solar path after longitude and equation-of-time adjustment
Solar noon is when the Sun reaches its highest daily altitude for the selected coordinates.
What solar noon and day length mean
Solar noon is not necessarily 12:00 on the local clock. It is the moment when the Sun is highest in the sky for the chosen longitude on the selected date. That is why solar noon is a useful reference point for comparing coordinates even when legal time zones, daylight saving rules, or city-level clock conventions differ.
Day length is the amount of time between sunrise and sunset. It changes with latitude and season, which is why locations near the equator stay closer to a 12-hour balance while higher latitudes can have very short winter days and very long summer days.
Why timezone-aware local clock time matters
Most people do not act on a raw UTC-style solar event. They act on a local wall clock. That is why a stronger sunrise sunset calculator should not stop at abstract coordinate output. It should also convert the sunrise, sunset, twilight, and solar-noon events into the legal local clock time that matches the place you are planning around.
This matters for travel, outdoor work, prayer scheduling, photography, events, and any situation where the difference between UTC and local time can move the visible sunrise or sunset to a different hour or even a different calendar date. The coordinates still determine the Sun's geometry, but the timezone determines how you use the answer in real life.
Coordinate lookup, current-location use, and destination time
Many sunrise and sunset tools either ask for a city name or use the browser's current location. This page keeps the coordinate fields visible because latitude and longitude are the real calculation inputs, but it also gives you shortcuts for common scenarios. A current-location helper is useful when you want sunrise and sunset times where you are standing; presets are useful when you want a known example before entering your own place.
For remote planning, check the display timezone after choosing coordinates. A latitude and longitude pair for Sydney shown in a London timezone would still describe the correct solar event, but the wall-clock time would not be the one a person in Sydney would normally use. Matching coordinates, date, and destination timezone is the cleanest workflow for travel, outdoor work, photography, event timing, and astronomy planning.
Civil, nautical, and astronomical twilight explained
Twilight starts before sunrise and continues after sunset because the Sun still illuminates the atmosphere even after it drops below the horizon. Civil twilight usually provides enough ambient light for many everyday outdoor tasks. Nautical twilight is darker but still useful for horizon distinction. Astronomical twilight ends only when the sky becomes dark enough for full astronomical observation.
That is why a strong sunrise sunset calculator also shows twilight bands. In real life, many planning decisions depend less on the exact sunrise and sunset minute and more on how much practical low-light time surrounds the horizon crossing.
Why sunrise and sunset times change through the year
Sunrise and sunset times shift because Earth's axis is tilted and because the Sun's apparent path changes through the seasons. As the Sun's declination changes, the time spent above the horizon changes too. Longitude also matters because solar time is tied to the position of the Sun relative to your meridian rather than only to a political time zone.
This is why sunrise and sunset by latitude and longitude is a more precise way to think about the problem than a generic city name alone. The coordinates determine the solar geometry, and the chosen date determines where the Sun sits in the seasonal cycle.
Why day length change is useful alongside sunrise and sunset
A sunrise sunset calculator becomes more useful when it shows whether the day is getting longer or shorter versus the previous day. That extra comparison explains whether the selected date is moving deeper into winter, closer to an equinox, or toward a summer maximum instead of leaving the user with a single isolated pair of clock times.
This is especially helpful when you are comparing dates for travel, outdoor activity, or seasonal planning. Two sunrise and sunset pairs can look similar at a glance, while the day-length trend tells you whether the daylight window is still expanding, flattening out, or shrinking.
Polar day, polar night, and no-sunrise / no-sunset results
At high latitudes, there are dates when the Sun never rises above the horizon or never drops below it. A sunrise sunset calculator can correctly return no sunrise or no sunset for those cases. This is not a broken result. It reflects a real solar geometry outcome tied to latitude and season.
Even when there is no conventional sunrise or sunset, solar noon can still be meaningful, and twilight bands may still appear depending on how far below the horizon the Sun travels. This is why polar results need explanation instead of being hidden.
Frequently asked questions
How is sunrise sunset calculator output determined?
The result comes from the selected date, latitude, and longitude, using a solar-position model that estimates solar declination, hour angle, solar noon, and the standard apparent horizon crossing used for sunrise and sunset.
What is solar noon?
Solar noon is the moment when the Sun reaches its highest apparent point in the sky for the selected coordinates on that date. It is a solar reference point, not automatically 12:00 by the local clock.
Why do sunrise and sunset times change through the year?
They change because Earth's axial tilt shifts the Sun's apparent path through the seasons. That changes both the time of horizon crossing and the total day length.
What do civil, nautical, and astronomical twilight mean?
They describe how far below the horizon the Sun is after sunset or before sunrise. Civil twilight is the brightest, nautical twilight is darker, and astronomical twilight ends when the sky becomes fully dark for astronomy.
Why can a location show no sunrise or no sunset?
At high latitudes, the Sun can stay above or below the horizon all day on some dates. That produces midnight-sun or polar-night style results.
Are these times local clock time or solar time?
This page converts the solar-event calculation into the timezone you choose for display, so the sunrise, sunset, solar noon, and twilight rows can be used as legal local clock times for planning. The coordinates still determine the underlying solar geometry.
Can I use this sunrise and sunset calculator by latitude and longitude only?
Yes. This tool is designed around coordinates and date, which is often more precise than relying on a place name alone.
What is the difference between day length and twilight length?
Day length measures the span between sunrise and sunset. Twilight length measures the lower-light periods before sunrise and after sunset when the Sun is below the horizon but still influencing the sky brightness.
Why might a zip-code based result differ from a coordinate result?
Zip-code tools often map you to a representative location, while coordinates define the exact latitude and longitude used in the solar geometry. Small location differences can shift sunrise and sunset times slightly.
Why can the displayed sunrise or sunset land on a different calendar date after timezone conversion?
The solar event itself is tied to one UTC instant. When that instant is converted into a legal local timezone, it can shift to the previous or next local calendar date, especially when you compare distant longitudes or select a timezone far from the coordinates.
Can I use my current location for sunrise and sunset times?
Yes, when your browser makes location permission available. The current-location helper fills the latitude and longitude fields from the device location estimate, then you can choose the date and confirm the display timezone. If permission is unavailable, you can still enter coordinates manually or start from a preset.
Should the timezone match my device or the destination?
For local planning, your device timezone may already be correct. For travel or remote coordinates, choose the destination timezone so the sunrise, sunset, solar noon, and twilight rows appear as the local wall-clock times used at that place.
Does this page account for mountains, local terrain, or building obstructions?
No. It uses astronomical horizon geometry. Local terrain, skyline obstructions, and weather can change what you actually see at the horizon.
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