Definition of Entire day
This phrase signifies an undivided day, not parts of two days. An entire day must have a legal, fixed, precise time to begin, and a fixed, precise time to end. A day, in contemplation of law, comprises all the twenty-four hours, beginning and ending at twelve o’clock at night; e.g., in a statute requiring the closing of all liquor establishments during “the entire day of any election,” etc., this phrase means the natural day of twenty-four hours, commencing and terminating at midnight. See also Day.
That's the definition of Entire day in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.