Abstract: A clock according to an exemplary embodiment of the present invention includes: an hour hand part which includes a first hour hand for indicating time of a first country to be shown, and a second hour hand for indicating time of a second country to be shown; an hour hand plate which indicates times including a reference line for defining 12 am; a city name plate on which an international date line and city names are marked and which is rotated together with the first hour hand; and a date display part which displays two continuous dates based on the international date line, in which in the date display part, the date is changed as the international date line provided on the city name plate, which is rotated relative to the hour hand plate, passes over the reference line provided on the hour hand plate.