Do not set the date in the gemspec.

Author: postmodern

resque.gemspec

@@ -4,7 +4,6 @@ require 'resque/version'
 Gem::Specification.new do |s|
   s.name              = "resque"
   s.version           = Resque::Version
-  s.date              = Time.now.strftime('%Y-%m-%d')
   s.summary           = "Resque is a Redis-backed queueing system."
   s.homepage          = "http://github.com/defunkt/resque"
   s.email             = "[email protected]"