How do I display dates on the x-axis for nvd3 / d3.js?

Question

I\'m using nvd3, but I think this is a general d3.js question about time scale and formatting. I\'ve created a simple example that illustrates the problem (see code below):<

Answer 1

Try creating a new Date object before the tick for the x-axis gets passed to the formatter:

.tickFormat(function(d) { return d3.time.format('%b %d')(new Date(d)); })

See the documentation for d3.time.format to see how you can customize the formatting string.

Answer 2

Adding on to seliopou's answer, to correctly align the dates with the x-axis, try this:

chart.xAxis
      .tickFormat(function(d) {
          return d3.time.format('%d-%m-%y')(new Date(d))
      });

  chart.xScale(d3.time.scale()); //fixes misalignment of timescale with line graph