Del. Code 15, § 2037 : Elections — Registration Officers And Mobile Registration; Registration By Mail — Registration Deadlines — Deadline to register to vote: special elections Date: 2 Sep 2016 TEXT PDF Current through 2016 Legislative Session, Act 399 The last day to register to vote for any special election shall be 10 days prior to the date of the special election. Del. C. § 2037 75 Del. Laws, c. 232, § 27.;