The special election to fill the House District 18 seat has been set for September 12, 2015.

Rep. Mike Barbieri vacated the seat to take a job leading the state’s Division of Substance Abuse and Mental Health.

In a written statement, House Speaker Pete Schwartzkopf said the date was chosen to give candidates time to reach out to voters in the district and, by scheduling the election on a Saturday, to make voting “as convenient as possible.”