--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/javascript/d3/src/time/days.js	Thu Apr 10 14:20:23 2014 +0200
@@ -0,0 +1,11 @@
+d3.time.days = d3_time_range(d3.time.day, function(date) {
+  date.setDate(date.getDate() + 1);
+}, function(date) {
+  return date.getDate() - 1;
+});
+
+d3.time.days.utc = d3_time_range(d3.time.day.utc, function(date) {
+  date.setUTCDate(date.getUTCDate() + 1);
+}, function(date) {
+  return date.getUTCDate() - 1;
+});