The John Adams Courthouse houses the Massachusetts Supreme Judicial Court, the Massachusetts Appeals Court, and the Social Law Library, which is the nation's oldest law library. The John Adams Courthouse is generally open for visitors on normal business days, Monday through Friday, from 9 a.m. to 5 p.m. The Supreme Judicial Court is open from 8:30 a.m. to 4:30 p.m. The Appeals Court Clerk's Office is open from 8:30 a.m. to 4:30 p.m. The Social Law Library is open from 8:30 a.m. to 4:30 p.m. Supreme Judicial Court and Appeals Court sessions are open to the public.