The era name, which identifies the year in Japanese dates, is set to change on May 1, 2019, when Crown Prince Naruhito assumes the throne upon the abdication of his father, Emperor Akihito. The new era name will be Reiwa (令和).
Heisei (平成 ), the current era name, has been used since 1989, when Akihito succeeded his father Hirohito as emperor. For example, the year 2018 was known as 平成30年 (Heisei year 30) in Japanese.
Japan also uses the Gregorian calendar for dates.