Using Tickformat (Date)

Mix.install([
  {:plotly_ex, "~> 0.3"},
  {:kino, "~> 0.18"}
])

Section

For date axes, tickformat uses d3-time-format specifiers. Common tokens: %d day, %B full month name, %b abbreviated month, %a abbreviated weekday, %Y 4-digit year. Use \n for multi-line tick labels.

alias Plotly.{Figure, Scatter}

Figure.new()
|> Figure.add_trace(
  Scatter.new(
    x: ["2020-01-15", "2020-02-15", "2020-03-15",
        "2020-04-15", "2020-05-15", "2020-06-15"],
    y: [10, 14, 12, 18, 15, 20],
    mode: "lines+markers"
  )
)
|> Figure.update_layout(
  title: "Custom Date Tick Format",
  xaxis: %{tickformat: "%d %B (%a)\n%Y"}
)
|> Plotly.show()