Sorting Marks By Chronological Date

I am having issues sorting this chart by date on the y-axis. I am not sure if I am missing a sort transform somewhere or if I am just missing something obvious. It seems like it wants to sort the dates by month rather than in chronological order as I would like.

  width: 1000,
  height: 2000,
  marginLeft: 55,
  x: { axis: "top", tickFormat: "%" },
  y: { axis: "left", label: null },
  color: {
    scheme: "Spectral",
    legend: "ramp",
    width: 1300,
    label: "Well:"
  marks: [
    Plot.barX(tidy, {
      x: "flows",
      y: "month",
      channels: { month: "month" },
      fill: "well",
      offset: "normalize",
      sort: { y: "-x" },
      tip: true

You will need to create a date field in your dataset and then sort by that date (not the strings in the ‘name’ field).

Here is a fork with dates: