Daylight Length Calculator

Hours of daylight for any date and latitude — sunrise, sunset, and day length.

Date:

Latitude (decimal, -90 to 90):

How to use

Enter date and latitude, then click Calculate.

How accurate is it?

Within ~15 minutes for most latitudes using the solar declination formula. Near the poles, polar day/night is flagged.

What latitude should I enter?

Your city's latitude — e.g. New York 40.7, London 51.5, Sydney -33.9 (negative south of equator).

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