The town's 300th anniversary celebrations will begin with basketball games featuring alumni of the high school’s boys’ and girls’ teams at 5 p.m. Jan. 4. The free event, taking place in the Weston High gym, will have the former players facing off against the current squads. Weston 300 merchandise will be available for purchase by spectators. The yearlong observance will be officially launched with a Town Hall ceremony on Jan. 12, the tercentenary of Weston’s incorporation. Alumni interested in signing up to play should e-mail Mary Duffey at email@example.com.