diff --git a/app/models/site.rb b/app/models/site.rb
--- a/app/models/site.rb
+++ b/app/models/site.rb
@@ -18,7 +18,7 @@
     if tmatch = /(\d+):(\d+)/.match(contest_time)
       h = tmatch[1].to_i
       m = tmatch[2].to_i
-      return Time.now > (self.start_time + h.hour + m.minute)
+      return Time.now.gmtime > (self.start_time + h.hour + m.minute)
     else
       false
     end