正せい閏じゅん

noun

normal and leap years

Technical term used in calendar contexts to refer to common years and leap years collectively.

• 暦こよみの計けい算さんでは、正せい閏じゅんを正ただしく区く別べつする必ひつ要ようがある。

  In calendar calculations, it is necessary to correctly distinguish between normal and leap years.

noun

legitimate and illegitimate dynasties

Historical term used in discussions of imperial succession, particularly in the context of the Northern and Southern Courts period in Japan.

• 南なん北ぼく朝ちょう時じ代だいの正せい閏じゅん論ろん争そうは、歴れき史し学がく上じょうの重じゅう要ようなテーマである。

  The debate over legitimate and illegitimate dynasties during the Nanboku-chō period is an important topic in historiography.