Index: node_modules/d3-time/src/hour.js
===================================================================
--- node_modules/d3-time/src/hour.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-time/src/hour.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,26 @@
+import {timeInterval} from "./interval.js";
+import {durationHour, durationMinute, durationSecond} from "./duration.js";
+
+export const timeHour = timeInterval((date) => {
+  date.setTime(date - date.getMilliseconds() - date.getSeconds() * durationSecond - date.getMinutes() * durationMinute);
+}, (date, step) => {
+  date.setTime(+date + step * durationHour);
+}, (start, end) => {
+  return (end - start) / durationHour;
+}, (date) => {
+  return date.getHours();
+});
+
+export const timeHours = timeHour.range;
+
+export const utcHour = timeInterval((date) => {
+  date.setUTCMinutes(0, 0, 0);
+}, (date, step) => {
+  date.setTime(+date + step * durationHour);
+}, (start, end) => {
+  return (end - start) / durationHour;
+}, (date) => {
+  return date.getUTCHours();
+});
+
+export const utcHours = utcHour.range;