What country forced a 2000-mile deviation in the International Date Line?

In 2011, Kiribati, an island nation in the central Pacific, made a significant change to the International Date Line by moving it 2,000 miles to include its easternmost islands in the same time zone as its western islands. This adjustment was made to ensure that all of Kiribati's islands would share the same day, facilitating trade and communication. The change affected international timekeeping and led to Kiribati being one of the first countries to welcome the new day.