The SAT (Scholastic Aptitude Tests and Scholastic Assessment Tests) is a standardized test for an entrance exam used by most of the US colleges and universities. By assessing your school grades and your SAT scores, you will be considered as a potential student for college admissions by College Board ETS (Educational Testing Service).
The purpose of SAT is to take admissions of students in undergraduate programs of US colleges and universities.
Every year, the SAT entrance exam is held nationally in October, November, December, January, March (US only and also SAT only), May and June.