| 摘要 |
PROBLEM TO BE SOLVED: To provide a world clock which can simultaneously display the present time at selected three cities and the time difference between two cities to be displayed, without making home time switching. SOLUTION: World clock is provided with displaying means 11-19 for simultaneously displaying the names and present time of first, second, and third cities and the time differences, between the first and second cities, second and third cities, and first and third cities. The clock is constituted to generate the time of the first city by means of a first city time counting means 21 and the time of the second city and the difference in time between the first and second cities, by means of a second city information computing means 23, which makes computation based on the information on the time of the first city and the information on reference time difference from a reference difference-in-time storing means 34. The clock is also constituted to generate the time of the third city and the time difference between the first and third cities, by means of a third city information computing means 24 which makes computation, based on the information on the time of the first city and the information on reference difference- in-time from the storing means 34. |
