Japanese era date昭和15年5月21日 (火)
Shōwa 15 . 5 . 21 (Tue)Gregorian date: Tuesday, May 21st 1940
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TodayShort form: S15.5.21
Zodiac year: Year of the Metal Dragon · 庚辰 (kanoe-tatsu)
Traditional month name: 皐月 (satsuki)
The Shōwa era started on December 25th 1926 and ended on January 7th 1989.
The emperor during this era was Emperor Hirohito.