The page calculates sunrise and sunset locally from the date, geographic coordinates and time zone. Values are not copied from a weather forecast and are displayed to the nearest minute.
Clock changes are applied through the stated IANA time zone. During polar day or polar night, the table reports the astronomical condition instead of inventing a clock time.
Understanding accuracy
The calculated time describes a standardised horizon. Mountains, buildings, elevation, atmospheric conditions and the actual observation point can shift the visible rise or set by several minutes. Photography, navigation or safety-critical planning should therefore also use an appropriate local specialist source.