import “day”; import “interval”; import “time”;

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

date = d3.time.day(date);
date.setDate(1);
return date;

}, function(date, offset) {

date.setMonth(date.getMonth() + offset);

}, function(date) {

return date.getMonth();

});

d3.time.months = d3.time.month.range; d3.time.months.utc = d3.time.month.utc.range;