1 d3.time.minutes = d3_time_range(d3.time.minute, d3_time_minutesStep, function(date) {

     2   return date.getMinutes();

     3 });

     4 

     5 d3.time.minutes.utc = d3_time_range(d3.time.minute, d3_time_minutesStep, function(date) {

     6   return date.getUTCMinutes();

     7 });

     8 

     9 function d3_time_minutesStep(date) {

    10   date.setTime(date.getTime() + 6e4); // assumes no leap seconds

    11 }