Calendar abbr (3)

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4 3*

mar

sep nov oct aug

(Other definitions for mar that I've seen before include "Blemish" , "Spoil something" , "Damage; month (abbr.)" , "Spoil or deface" , "Detract from" .)

I've seen this clue in The Wall Street Journal, the King Feature Syndicate, the Penny Press, The Star Tribune, the LA Times and The New York Times.

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