Year-Day Principle

The reckoning of a symbolic day as a year in interpreting time periods in symbolic prophecy. The biblical texts generally cited for this are Num. 14:34 and Ezra 4:6 , both of which mention a “day for a year.” This principle, used from medieval times for some of the periods in the books of Daniel and Revelation, became a basic part of the standard Protestant school of interpretation, called the historical, or historicist, view of prophecy. Seventh-day Adventists, being historicists, have inherited this method of interpretation from the earlier commentators. According to the year-day principle, a symbolic day in prophecy stands for a literal year, but a symbolic year stands for the same number of actual years as there are days in the symbolic year. The 1335 prophetic days ( Dan. 12:12 ) ...

From the Seventh-day Adventist Encyclopedia. Published with permission from the Review and Herald Publishing Association.