خط التاريخ الدولي
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<timefyi-glossary slug="international-date-line"></timefyi-glossary>التعريف
خط وهمي يتبع تقريبًا خط طول 180 درجة حيث يتغير التاريخ. العبور غربًا يضيف يومًا؛ العبور شرقًا يطرح يومًا.