--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/javascript/d3/src/time/hour.js	Thu Apr 10 14:20:23 2014 +0200
@@ -0,0 +1,8 @@
+d3.time.hour = function(date) {
+  var offset = date.getTimezoneOffset() / 60;
+  return new Date((~~(date / 36e5 - offset) + offset) * 36e5);
+};
+
+d3.time.hour.utc = function(date) {
+  return new Date(~~(date / 36e5) * 36e5);
+};