Daylight Hours Calculator (Hiking)

A daylight hours calculator for hiking uses your location (latitude and longitude), the date, and your time zone to compute sunrise and sunset times, solar noon, and total daylight duration. For hikers, it also factors in a trail-start delay and a safety buffer before sunset to give you a realistic, safe hiking window for the day.

Earth's axial tilt of about 23.5° means different latitudes receive varying amounts of sunlight as the planet orbits the sun. Near the summer solstice, northern latitudes enjoy long days; near the winter solstice, days are shortest. The effect is most dramatic at high latitudes — near the poles, you can experience nearly 24 hours of daylight or darkness at the extremes.

The solar position algorithm used here (based on the NOAA/Spencer approach) is accurate to within 1–2 minutes for most latitudes and dates. Real-world times can vary slightly due to local terrain features like mountains or valleys that obscure the horizon, as well as atmospheric refraction conditions on the day.

Yes — at higher altitudes you can often see the sun earlier and lose it slightly later than someone at sea level, because the horizon is effectively lower. However, in mountainous terrain, large peaks can block sunlight well before the astronomical sunset, significantly shortening your usable hiking daylight. Always scout your specific trail conditions.

Yes. The calculation uses a standard solar depression angle of approximately 0.833° below the geometric horizon to account for atmospheric refraction and the angular diameter of the sun. This is the standard convention used by NOAA and most astronomical calculators, and it closely matches what you actually observe at sunrise and sunset.

This is due to the Equation of Time — the difference between clock time and solar time. After the winter solstice, total daylight starts increasing, but sunrise times can continue getting later for a few weeks because the sun's day (solar noon) is still shifting later in the day. Sunset starts getting later first, then sunrise eventually follows.

Most experienced hikers and outdoor safety organizations recommend finishing your hike at least 1 hour before sunset. This accounts for slower pace on the return, fatigue, unexpected route-finding issues, and the fact that light fades significantly in the 30–45 minutes before the sun actually sets below the horizon.

The calculator handles most latitudes, but extreme polar latitudes (above ~66.5°N or below ~66.5°S) can experience midnight sun or polar night where the sun never rises or never sets. In those edge cases the result will indicate no sunrise or no sunset for that date and location.