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Some brands join a day. Microsoft created one. In 2018, Microsoft founded National Solitaire Day and National Day Calendar® proclaimed May 22 as its permanent home: the anniversary of the day Solitaire first shipped with Windows 3.0 in 1990.
The result is a bra...
The official observance page: Microsoft founded National Solitaire Day in 2018 and National Day Calendar proclaimed May 22, the anniversary of Solitaire shipping with Windows 3.0, as its permanent date.
Microsoft marked Solitaire's 30th anniversary on May 22, 2020 with a coordinated attempt at the most games completed in one day; National Day Calendar issued the media alert carrying the event to press.
Posted Sep 7, 2026