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Day Length

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trulycompass.com

Day Length Tracker

See today's daylight hours, the longest and shortest days of the year, and how day length changes through the seasons at your location.

Today's Day Length

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Longest Day

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Shortest Day

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Yearly Daylight Difference

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Astronomy Reference

Why day length changes through the year.

Earth's 23.5° axial tilt is the reason we have seasons and changing day lengths. As Earth orbits the sun, different hemispheres tilt toward or away from the sun, directly controlling how long the sun is above the horizon.

What does day length mean?

Day length is the total duration of daylight at your location—from sunrise to sunset. It changes daily throughout the year due to Earth's axial tilt and orbital position. Day length is shortest at winter solstice and longest at summer solstice.

What is the day length in India?

Day length varies across India (8-14 hours annually). Northern India experiences more extreme variation (8 hours in December, 14+ hours in June). Southern India has less variation (10-12 hours year-round) due to proximity to equator.

What is 20 minutes before sunrise called?

This is called "civil twilight" or the "civil dawn." It's the period when the sun is below the horizon but its light brightens the sky. Artificial lighting is no longer required to move about safely.

What is the actual length of a day?

A day is exactly 24 hours of Earth's rotation. However, "day length" commonly refers to daylight hours (sunrise to sunset), which vary from 0-24 hours depending on latitude and season.