Dangun calendar

Today (at UTC+00)
Monday, 28 September 2026
Korean	18 Dakdal, 4359 DE
Other calendars Akan Nkyidwo Armenian 10 Sahmi 1476 Aztec Nēmontēmi 1, 2 Ātl Babylonian 15 Ululu, 2337 SE Balinese pawukon Luang, Pepet, Kajeng, Jaya, Pon, Urukung, Coma of Ugu, Kala, Gigis, Pati Bengali 13 Ashshin, BS 1433 Chinese Yin Wood Snake・Roof Mansion Fire Horse Year, Month 8, Day 18 (Qiufen, 10 days until Hanlu) Common Era 28 September 2026 CE Coptic 18 Thout, AM 1743 Egyptian 15 Mechir, 2775 NE Ethiopian 18 Maskaram, 2019 Amätä Məhrät French Republican Décade I, Sextidi de Vendémiaire de l'Année 235 de la République Gregorian 28 September, AD 2026 Hebrew 17 Tishrei, AM 5787 Hindu Revatī・Dhruva Solar: 12 Āśvina, 1948 SE Lunisolar: Dvitīyā, Kṛishna pakṣa of Bhādrapada, 2083 VE Rāudra・5127 KY・1,872,846 Icelandic Mánudagur, 5 Haustmánuður 2026 Islamic 15 Rabi' al-thani, AH 1448 (using tabular method) ISO week date 2026-W40-1 Japanese 18 Hazuki, Reiwa 8 (Shūbun, 10 days until Kanro) Julian 15 September, AD 2026 (AM 7534) Julian day 2461312 Maya 13.0.13.17.9 2 Yax, 2 Muluc Roman ante diem XVII Kalendas Octobres, MMDCCLXXIX AUC Solar Hijri 6 Mehr, SH 1405 Tibetan 17 khrums, me pho rta 2153 or 1772 or 1000
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A South Korean postage stamp from 1956. Note the year 4289 in the upper left corner.

The Dangun calendar (Korean: 단군기원; Hanja: 檀君紀元) is a Korean calendar system whose epoch is set as the year 2333 BC, the legendary year of the founding of Gojoseon by Dangun Wanggeom. It was the official calendar system of South Korea from 1948 to 1961.

Dates are calculated from Korea's meridian (135th meridian east in modern time for South Korea), and observances and festivals are based on Korean culture.

History

The ancient East Asian state of Gojoseon is widely considered the first state of the Korean nation. The founding myth of Gojoseon, as recounted by Il-yeon's 13th-century text Samguk Yusa, denotes that the kingdom was founded by the mythical deity Dangun fifty years after the enthronement of the legendary Chinese Emperor Yao, on the year of gyeongin (2311 BC). On a separate note, however, Il-yeon added that he believed the actual date of foundation was on the year of jeongsa (2284 BC). Alternatively, citing Sima Guang's Zizhi Tongjian and Yi Sŭnghyu's Chewang un'gi, the Tongguk t'onggam argues that the year of Gojoseon's foundation was the year of mujin (2333 BC), only twenty-five years after the rise of Emperor Yao.

On a petition to King Gongmin, Paek Munbo, a civil servant of Goryeo, advised the King to expand the studies of Confucianism further, arguing that, as a heavenly cycle of 3600 years had passed since the founding of Gojoseon, a new anniversary of opportunities would be bestowed upon the kingdom.

The Dangun calendar was later adopted by followers of Daejongism, a new religious movement founded in 1909 that centered on the worship of figures of Korean mythology. It became the official calendar of the Republic of Korea on September 25, 1948, under the Reign-Title Act (연호에 관한 법률). The Gregorian calendar was adopted as the official calendar of South Korea in December 1961, effectively replacing the Dangun calendar from January 1, 1962.