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diff --git a/src/node_modules/es-abstract/2017/HourFromTime.js b/src/node_modules/es-abstract/2017/HourFromTime.js
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+'use strict';
+
+var floor = require('./floor');
+var modulo = require('./modulo');
+
+var timeConstants = require('../helpers/timeConstants');
+var msPerHour = timeConstants.msPerHour;
+var HoursPerDay = timeConstants.HoursPerDay;
+
+// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.10
+
+module.exports = function HourFromTime(t) {
+ return modulo(floor(t / msPerHour), HoursPerDay);
+};