Residents have until Friday to register to vote in the April 6 annual town election and the May 6 and 8 annual Town Meeting. The town clerk’s office will be open extra hours, until 8 p.m., on Friday to accommodate those seeking to register. Residents can also register during the regular town clerk office hours, 7:30 a.m. to 4:30 p.m. Monday through Friday. Mail-in voter registration forms can be obtained through the clerk’s page on the town website, www.tewksbury.net . For more information, call the town clerk’s office at 978-640-4355.