'Seventh Year' in the Bible

And Zimri went in and smote him, and killed him in the twenty-seventh year of Asa king of Judah, and reigned in his stead.

In the twenty-seventh year of Asa king of Judah Zimri reigned seven days in Tirzah. Now the people were encamped against Gibbethon, which belonged to the Philistines.