Glossary

Ten'an

天安

Term · calendar

Japanese era name (天安) for the years 857–859: 857 is Ten'an 1 (元年) and Ten'an 3 is 859. Ten’an (天安) is a Japanese era name (nengō), proclaimed in 857. Its years are counted in lunar years from the new year before the proclamation: 857 is Ten’an 1 (元年), 859 its last year, Ten’an 3. A Japanese source dates a year within it as “Ten’an 2” (天安2年) rather than by a continuous count. Before: Saikō. After: Jōgan.