Japanese era date昭和18年5月31日 (月)
Shōwa 18 . 5 . 31 (Mon)Gregorian date: Monday, May 31st 1943
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TodayShort form: S18.5.31
Zodiac year: Year of the Water Sheep · 癸未 (mizunoto-hitsuji)
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.