This on-line calculator helps to easily define the exact dawn or dusk time in any point of the planet on any desired date. The complete algorithm to calculate the sunrise and sunset is programmed in it. Along with time data stated till minutes the system incorporates data about winter/summer time shifts.
In order to obtain the data you should input the necessary location latitude and longitude. Use full stop as a separating symbol between an integer number and its decimal part. If you need a southern hemisphere location, input the latitude with the negative sign. For a western hemisphere location also use the negative symbol before the longitude value.
Also input a necessary date in the corresponding field.
After calculation, along with information about the exact time and UTC shifts, you will see the necessary location on an interactive map.