A Study on the Optimal Duration of Daylight Saving Time (DST) in Korea

Details A Study on the Optimal Duration of Daylight Saving Time (DST) in Korea A Study on the Optimal Duration of Daylight Saving Time (DST) in Korea

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jass...26..317m&link_type=abstract

Journal of Astronomy and Space Sciences. Vol. 26, no. 3, 317-328

Astronomy and Astrophysics

Astronomy

Daylight Saving Time, Summer Time, Time Friction

Scientific paper

Daylight saving time aims at spending effective daylight in summer season. Korea had enforced daylight saving time twelve times from 1948 to 1988. Since 1988, it is not executed, but it is recently discussed the resumption of DST. In this paper, we investigate the trend of DST in other countries, review the history of DST in Korea, and suggest the optimal DST duration in terms of astronomical aspects (times of sunrise and sunset). We find that the starting day of DST in Korea is apt for the second Sunday in May or the second Sunday in April according to the time of sunrise or to the difference between Korean standard meridian and observer's, respectively. We also discuss time friction that might be caused by time difference between DST and Korea Standard Time (KST).

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