SAT is an internationally recognised standardised test that evaluates your knowledge in reading, writing and quantitative aptitude and other specialised subjects. It is taken for undergraduate admission in United states and some other countries. SAT test pattern has four sections- Evidence-Based Reading and Writing, Reading Test, Writing and Language Test and Math while the Essay is optional. It is offered seven times each year in the US and six times internationally. You can sit for SAT test in October, November, December, January, March, May and June.