Live World Day and Night Map (Sunlight in Real Time)

Understanding the World Day and Night Map

The world day and night map shows which parts of the Earth are currently in daylight and which are in darkness. The moving boundary between light and shadow is known as the terminator line. This line constantly shifts as the Earth rotates, completing a full cycle every 24 hours.

Because the Earth is tilted at approximately 23.5 degrees on its axis, the distribution of daylight is not the same throughout the year. Around the equinoxes (March and September), day and night are nearly equal worldwide. However, near the summer and winter solstices, daylight hours vary significantly depending on latitude.

Why does latitude affect daylight?

Cities located near the equator experience almost equal day and night all year long. For example, cities like Singapore or Quito have roughly 12 hours of daylight daily.

In contrast, cities at higher latitudes experience strong seasonal variation. In June, northern cities such as Stockholm, Oslo, or Edmonton enjoy very long evenings, sometimes with sunlight lasting close to midnight. Above the Arctic Circle, the sun may not set at all — a phenomenon known as the midnight sun.

During winter, the opposite occurs. Some northern cities experience extremely short days, and regions above the Arctic Circle can enter polar night, when the sun does not rise for days or even weeks.

What determines sunrise and sunset times?

Sunrise and sunset depend on:

• Latitude
• Longitude
• Date of the year
• Earth's axial tilt
• Atmospheric refraction

This map calculates daylight conditions for major cities in real time using astronomical formulas. Each city is classified as:

• Day – Sun above the horizon
• Night – Sun below the horizon
• Dawn – Civil twilight before sunrise
• Dusk – Civil twilight after sunset

Why daylight duration matters

Daylight duration influences climate, daily routines, tourism, and even mental health. Long summer evenings encourage outdoor activities in northern cities, while shorter winter days can affect energy use and lifestyle patterns.

Understanding global daylight patterns is useful for:

• Planning international calls
• Scheduling travel
• Studying seasonal variations
• Comparing cities by latitude
• Exploring time zone differences