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 | January 7, 1980 Peppermint Patty gives a correct answer in her class
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 | August 1, 1983 Peanuts Collectors Club debuts, with a 12-page newsletter
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 | July 1, 1984 Peanuts is now seen in a record -breaking 2,000 newspapers around the world
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 | November 4, 1985 Sally begins to look for Halley's Comet
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 | January 24, 1989 Olaf debuts
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 | October 1, 1989 Good Grief, the only authorized biography of Charles Schulz, is published
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