1 files changed, 20 insertions, 0 deletions
diff --git a/rubocop/cop/gitlab/change_timzone.rb b/rubocop/cop/gitlab/change_timzone.rb
new file mode 100644
index 00000000000..63e6dd411f3
--- /dev/null
+++ b/rubocop/cop/gitlab/change_timzone.rb
@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+module RuboCop
+  module Cop
+    module Gitlab
+      class ChangeTimezone < RuboCop::Cop::Cop
+        MSG = "Do not change timezone in the runtime (application or rspec), " \
+          "it could result in silently modifying other behavior.".freeze
+
+        def_node_matcher :changing_timezone?, <<~PATTERN
+          (send (const nil? :Time) :zone= ...)
+        PATTERN
+
+        def on_send(node)
+          changing_timezone?(node) { add_offense(node) }
+        end
+      end
+    end
+  end
+end