diff --git a/lib/rubygems/specification.rb b/lib/rubygems/specification.rb
index f4e609a..749f38b 100644
--- a/lib/rubygems/specification.rb
+++ b/lib/rubygems/specification.rb
@@ -1524,7 +1524,7 @@ class Gem::Specification < Gem::BasicSpecification
                       "invalid date format in specification: #{date.inspect}")
               end
             when Time, Date then
-              Time.utc(date.year, date.month, date.day)
+              Time.utc(date.utc.year, date.utc.month, date.utc.day)
             else
               TODAY
             end