On this day: May 20

Published On: May 17 2013 04:26:12 PM CDT   Updated On: May 20 2016 01:00:00 AM CDT

Vasco da Gama arrives in India, Christopher Columbus dies, Norman Rockwell makes his Saturday Evening Post cover debut, HIV is discovered, and "Cheers" airs its series finale, all on this day.

OTD May 20 - Quebec sovereignty
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1980: In a referendum in Quebec, 60 percent percent of voters reject a proposal from the province's government to move toward independence from Canada. The referendum was the first on Quebec sovereignty, with a second such vote in 1995 narrowly failing.

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