February (pronunciation) is the second month of the year in the Julian and Gregorian calendars. It is the shortest month and the only month with fewer than 30 days. The month has 29 days in leap years, when the year number is divisible by four (except for years that are divisible by 100 and not by 400 in the Gregorian calendar). In common years the month has 28 days. In the Southern Hemisphere, February is the seasonal equivalent of August in the Northern Hemisphere.
February 14 is internationally known as Valentine's Day, a holiday celebrating love and affection between intimate companions. In the Armenian Apostolic Church, February 14 is the feast of the Presentation of Jesus at the Temple.
February 29 in the Gregorian calendar, the most widely used today, is a date that occurs only once every four years, in years evenly divisible by 4, such as 1976, 1996, 2000, 2004, 2008, 2012 or 2016 (with the exception of century years not divisible by 400, such as 1900). These are called leap years. February 29 is the 60th day of the Gregorian calendar in such a year, with 306 days remaining until the end of that year. It is also known as Leap Day.
Thrombosis (Greek θρόμβωσις) is the formation of a blood clot inside a blood vessel, obstructing the flow of blood through the circulatory system. When a blood vessel is injured, the body uses platelets and fibrin to form a blood clot, because the first step in repairing it (hemostasis) is to prevent loss of blood. If that mechanism causes too much clotting, and the clot breaks free, an embolus is formed. Thromboembolism is both thrombosis and its main complication, which is embolization.
Nikola "Niki" Pilic (Croatian: Nikola Pilić; born 27 August 1939, in Split, Croatia. He is a retired Croatian professional tennis player who competed for SFR Yugoslavia. He was one of the Handsome Eight. Pilić was central to the 1973 Wimbledon Boycott. That year the Yugoslav tennis federation alleged that Pilić had refused to represent them in a Davis Cup tie.