FAIRFIELD — When they went to school Monday morning, they were students at Eagle Hill Southport, but by the time class was dismissed that afternoon, they were students at The Southport School.

First begun in 1984, the school serves children in kindergarten through eighth grade with language-based learning differences and ADHD.

The school, located on Main Street in the Southport, recently purchased the historic bank building next door, and it is being converted into space for the school’s music programs. It was during that process, Headmaster Benjamin Powers said, that the sense of the school as part of the Southport community really hit home.

“What made that possible for us was going around the community seeking support,” Powers said of the school’s Southport neighbors. “The sense that we got was one of just great respect and love for this school that they helped found.”

The announcement came at an afternoon gathering of all 100 students, teachers, parents and alumni, where the announcement was kept a surprise. Powers counted down from 10 as two teachers unveiled the new name and logo.

Virginia Cargill, chairman of the school’s board of directors and Southport resident, said, “As a representative of the board and the Southport community, this is an exciting time to be a part of the school and there are big things on the horizon.”

According to Cargill, a planning committee “deliberated for months on this historic change for the school,” and the board of directors agreed the time was right. “It is a critical and important moment in our school’s history, and presents a new chapter of opportunity.”

While the school began in connection with Eagle Hill schools in Greenwich and Hardwick, MA, The Southport School “will be wholly unique with its new name, brand, and identity,” Powers said.

Once the announcement was made official, new signs were quickly hung outside, and students lined up to get new baseball caps, and car magnets, with the new logo, and were treated to cake and cupcakes.