Japanese era date昭和15年9月21日 (土)
Shōwa 15 . 9 . 21 (Sat)Gregorian date: Saturday, September 21st 1940
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TodayShort form: S15.9.21
Zodiac year: Year of the Metal Dragon · 庚辰 (kanoe-tatsu)
Traditional month name: 長月 (nagatsuki)
The Shōwa era started on December 25th 1926 and ended on January 7th 1989.
The emperor during this era was Emperor Hirohito.