Arbor Day, known in Korean as Sikmogil, is observed annually on April 5. The holiday was established to encourage tree planting and forest restoration, particularly following periods of deforestation in Korea’s modern history. It reflects the nation’s strong emphasis on environmental recovery and sustainable land management.

After the Korean War, large areas of forest were severely damaged. Arbor Day became a national movement to restore the country’s natural landscape through organized tree-planting campaigns. Schools, local governments, and community groups traditionally participated in planting trees, contributing to Korea’s successful reforestation efforts over the decades.

Although Arbor Day is no longer designated as an official public holiday, it remains an important environmental observance. Government agencies, environmental organizations, and citizens continue to promote tree planting and ecological awareness through various programs and campaigns.

For international readers, Arbor Day in Korea is comparable to environmental observance days in other countries, emphasizing sustainability, climate awareness, and the responsibility to protect natural resources.

Holiday Information

Name: Arbor Day (Sikmogil)
Date: April 5, 2026
Type: Environmental Observance Day
Public Holiday: No (observance day)
Theme: Tree Planting & Forest Conservation
Observed By: Republic of Korea