Earth & Space layer
Day length by country
Explore calculated daylight duration for each country's representative location.
Compare day length across countries on an interactive world map. Open any country for the latest value, the comparable-sample rank, the source, and the method.
What this measures
Longer daylight duration; shorter daylight duration.
Unit: hours. Daylight duration.
Methodology
Day length is calculated from date, latitude, solar declination and the standard sunrise/sunset altitude; representative country coordinates are used rather than observations.
Example countries
Open day length for a geographically diverse set of countries that currently have a comparable value. This is a crawl path, not a ranking.
Highest and lowest values
These lists use the same comparable-sample ranking as the map for Sep 13, 2026. They include only countries with a finite value among 193 available observations. Missing countries are unranked. This is not a complete world ranking.
High observed values
Low observed values
- New Zealand — 11h 40m
- Argentina — 11h 43m
- Chile — 11h 44m
- Uruguay — 11h 47m
- South Africa — 11h 49m
Coverage & source
- Source
- Astronomical calculation
- Period
- Calculated on request
- Frequency
- Daily calculation
- Data nature
- calculated
How to read this layer
- Highest and lowest figures on this page are comparable-sample observations, not a complete world ranking. What does a rank mean?
- This layer is calculated rather than observed. What observed, estimated, calculated, derived, and modelled mean
Rankings, where shown, describe only countries with comparable values in the selected period.