Japanese era date昭和55年12月21日 (日)
Shōwa 55 . 12 . 21 (Sun)Gregorian date: Sunday, December 21st 1980
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TodayShort form: S55.12.21
Zodiac year: Year of the Metal Monkey · 庚申 (kanoe-saru)
Traditional month name: 師走 (shiwasu)
The Shōwa era started on December 25th 1926 and ended on January 7th 1989.
The emperor during this era was Emperor Hirohito.