( red-letter days)
A red-letter day is a day that you will always remember because something good happens to you then.
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( red-letter days)
A red-letter day is a day that you will always remember because something good happens to you then.
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Collins COBUILD Advanced Learner's English Dictionary. Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне. 2006