The North Korean calendar or Juche calendar, named after the Juche ideology, is the system of year numbering used in North Korea.
The Juche calendar begins with the birth of the leader, Kim Il-sung, and was implemented on 9 September 1997, the national day of North Korea. And ever since that date, newspapers, news agencies, radio stations, public transport, and birth certificates began to use Juche years. The birth year of Kim Il-sung (1912) marks the start of the Juche years in the North Korean calendar. Thus, the year 2011 is “Juche 100″, and at present, the it is “Juche 105″ in North Korea.