var d3_time_scaleLocalFormat = d3.time.format.multi([
  [".%L", function(d) { return d.getMilliseconds(); }],
  [":%S", function(d) { return d.getSeconds(); }],
  ["%I:%M", function(d) { return d.getMinutes(); }],
  ["%I %p", function(d) { return d.getHours(); }],
  ["%a %d", function(d) { return d.getDay() && d.getDate() != 1; }],
  ["%b %d", function(d) { return d.getDate() != 1; }],
  ["%B", function(d) { return d.getMonth(); }],
  ["%Y", function() {return true; }]
]);

console output:

(new Date()).getDay()
4
d3.time.year(new Date())
Date 2015-01-01T06:00:00.000Z
d3_time_scaleLocalFormat().d3.time.year(new Date())
TypeError: d is undefined
d3_time_scaleLocalFormat.d3.time.year(new Date())
TypeError: d3_time_scaleLocalFormat.d3 is undefined