Always use Time.current (aliases internally to Time.zone.now)

Some specs where breaking close to midnight because 30.years.ago uses zone.now and Time.now.utc.to_date doesn't.
Also this will make all codebase consistent in the way time is deal with

app/models/poll/voter.rb

@@ -50,10 +50,10 @@ class Poll
         if dob.blank?
           nil
         else
-          now = Time.now.utc.to_date
+          now = Time.current.to_date
           now.year - dob.year - ((now.month > dob.month || (now.month == dob.month && now.day >= dob.day)) ? 0 : 1)
         end
       end
 
   end
-end
+end