year of publication
Refers to the year a book, journal, or other publication was issued. Common in bibliographic contexts.
この本の出版年は2020年です。
The year of publication of this book is 2020.
論文には出版年を明記してください。
Please clearly indicate the year of publication in the paper.
Compound of 出版 (shuppan, 'publication') and 年 (nen, 'year').