The SSAT is offered on 6 Saturdays between October and April at hundreds of locations throughout the U.S., Canada, and around the world. These 6 administrations are called Standard tests. For those unable to test on these Saturdays due to religious reasons, limited Sunday testing for Standards is also available.
A Flex test is an SSAT given on a day other than the 6 Standard test dates, usually with a member school or educational consultant.