Modifying the two flip clocks creates a situation in which there is a 30-minute time difference between them. In this situation, 30 Minutes can be a long-term project that carries out various performances. The Korea Standard Time was historically changed and “set” back in the year of 1912 during the Japanese occupation period—from 127.5 degrees east longitude to 135 degrees as Japanese standard compulsorily adjusted to go by 30-minute faster than as it was. Since then, South and North Korea have used the same standard time zone as Japan. However, there was a 30-minute time difference between South and North Korea in 2015 when North Korea set the standard time of 127.5 degrees by putting back the clock to its pre-1912 with the reason of clearing away the remnants of Japanese colonial rule. Due to that, for more than three years, South and North Korea have used different time zones, but the time zones became the same once again at the first Inter-Korean summit in 2018, when the North re-set it back to 135 degrees east longitude. From here, the artist Jaehyun Shin points out that the 30-minute time difference symbolically shows many problems surrounding inter-Korean relations, suggesting a metaphorical message that ideological and political quarrel resembles a performance.