Location
Latitude, longitude and date determine the broad seasonal pattern of sunset.
Estimating sunset times — Guide
Guidance for Sunset Time Estimator. Practical instructions, limitations, and accuracy tips.
This article explains the use and limitations of the interactive tool. No signup is required. Output can be approximate and should not substitute for authoritative sources when the stakes are high.
UTC conversion
Displayed UTC must be converted into the requested location’s time zone, accounting for daylight saving when applicable.
Precision
Topography, altitude, atmospheric refraction and the equation of time affect actual observed sunset. Use an authoritative ephemeris when minutes matter.