In the United States, high school seniors are typically 17-18 years old. They usually begin senior year at 17 years of age and are 18 years old during the school year or just after the school year ends. However, some students may be a bit younger or older for various reasons, such as starting school early or late, or repeating a grade. In Canada, students generally enter their Grade-12 year when they are 16 or 17 years old, and they generally graduate high school at 17 or 18 years old. In Italy, twelfth graders are often 17-18 years old, and on rarer occasions, can be 19 years old. In Israel, students typically begin twelfth grade when they are about 17 years old.