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Here’s a look back at what happened in the Chicago area on Dec. 1, according to the Tribune’s archives.

Is an important event missing from this date? Email us .

Chicago’s winter parking ban goes into effect Dec 1. Here’s what to know — snow or no snow.

Weather records (from the National Weather Service, Chicago )

High temperature: 68 degrees (1970)

Low temperature: Minus 6 degrees (1893)

Precipitation: 1.23 inches (2006)

Snowfall: 7.8 inches (1978)

1949: The Midwest Stock Exchange (now known as Chicago Stock Exchange), which merged the old Chicago Stock Exchange and the exchanges in St. Louis, Cleveland and Minneapolis-St. Paul, began trading.

1953: Hugh Hefner launched Playboy magazine in his Hyde Park apartment.

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