text: #!/usr/bin/env node
  require("../proof")(1, function (equal, tz) {
    tz = tz(require("timezone/America/Detroit"));
    // Landing on missing times.
    equal(tz("2010-03-13 02:30", "America/Detroit", "+1 day", "%c"), "Sun 14 Mar 2010 01:30:00 AM EST",
           "add day lands on missing dst start time");
  });
  