World Hypertension Day is Friday, May 17. It is an initiative of the World Hypertension League, an affiliate of the International Society of Hypertension. The purpose of the day is to raise awareness of hypertension and to prevent and control this silent killer. The theme for this this year is Know Your Numbers. Do you know yours? The “textbook” normal blood pressure is 120/80 mmHg. Optimal blood pressure can vary and is based on several factors including your cardiovascular risk and age. Speak to your health care professional to learn about your optimal blood pressure numbers.