which one is the longest day in a year ? A July 22 B June 20 C June 21 D June 22 which one is the longest day in a year ? Correct Answer June 21 Bissoy MCQ Team May 27, 2023 সাধারণ জ্ঞান আন্তর্জাতিক দিবসসমূহ Mercantile Bank Ltd Mercantile Bank Ltd - Officer - 2008