import “interval”; import “time”;

d3.time.hour = d3_time_interval(function(date) {

var timezone = date.getTimezoneOffset() / 60;
return new d3_time((Math.floor(date / 36e5 - timezone) + timezone) * 36e5);

}, function(date, offset) {

date.setTime(date.getTime() + Math.floor(offset) * 36e5); // DST breaks setHours

}, function(date) {

return date.getHours();

});

d3.time.hours = d3.time.hour.range; d3.time.hours.utc = d3.time.hour.utc.range;