Calculates the time difference between the two cities based on the catalogue data.
Sunrise/Sunset calculation for given latitude and longitude or for given city. Source:
Almanac for Computers, 1990
published by Nautical Almanac Office
United States Naval Observatory
Washington, DC 20392
The calculator shows the current time, universal time, and time for the selected city
This online calculator computes travel duration given departure time and city and arrival time and city using time zones information