Japanese Calendar Database

Notices

• Japanese Calendar
  • This database covers conversions since -659.
  • Judging era names in daily basis is possible since 701. However, the enforcement of Bunchu Era is temporarily assigned as 1372-05-04 because of the uncertainty of its exact date.
  • Japanese Luni-Solar Month Database
  • Search Japanese Calendar with Eto
  • Search Japanese Calendar with Daisho
• Solar Calendar
  • By default, solar calendar dates after Oct. 15th, 1582 refer to Gregorian Calendar and dates before that refer to Julian Calendar.
  • Year before 1 A.D. is the year 0.
• Limitation of one calculation is 400 days.
• References
  • Masao Uchida, Nihon Rekijitsu Genten, Yuzankaku, (1975).
  • Masao Uchida, Nihon Shoki Rekijitsu Genten, Yuzankaku, (1978).
  • Rekishigaku Kenkyukai, Nihonshi Nenpyo, Iwanami, (2001).
• We might modify this program without notice (ver.1.2a).