1 files changed, 22 insertions, 0 deletions
diff --git a/actionpack/lib/action_view/helpers/tags/datetime_field.rb b/actionpack/lib/action_view/helpers/tags/datetime_field.rb
new file mode 100644
index 0000000000..11d58744fd
--- /dev/null
+++ b/actionpack/lib/action_view/helpers/tags/datetime_field.rb
@@ -0,0 +1,22 @@
+module ActionView
+  module Helpers
+    module Tags
+      class DatetimeField < TextField #:nodoc:
+        def render
+          options = @options.stringify_keys
+          options["value"] = @options.fetch("value") { format_global_date_time_string(value(object)) }
+          options["min"] = format_global_date_time_string(options["min"])
+          options["max"] = format_global_date_time_string(options["max"])
+          @options = options
+          super
+        end
+
+        private
+
+          def format_global_date_time_string(value)
+            value.try(:strftime, "%Y-%m-%dT%T.%L%z")
+          end
+      end
+    end
+  end
+end