Note 46 — Chapter XVI · The Interpretation of Treaties.
A. C. (Archibald Colin) Campbell translation
"The word DAY is understood of the NATURAL DAY, or of the time during which the sun affords us his light, and of the CIVIL DAY, or the space of twenty-four hours. When it is used in a convention to point out a space of time, the subject itself manifestly shews that the parties mean the civil day, or the term of twenty-four hours."—Vattel, b. ii. ch. xvii. sect. 280.