{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "description": "Using utc scale with local time input.",
  "background": "white",
  "padding": 5,
  "width": 200,
  "height": 200,
  "style": "cell",
  "data": [
    {
      "name": "source_0",
      "values": [
        {"date": "Sun, 01 Jan 2012 23:00:00", "price": 150},
        {"date": "Mon, 02 Jan 2012 00:00:00", "price": 100},
        {"date": "Mon, 02 Jan 2012 01:00:00", "price": 170},
        {"date": "Mon, 02 Jan 2012 02:00:00", "price": 165},
        {"date": "Mon, 02 Jan 2012 03:00:00", "price": 200}
      ]
    },
    {
      "name": "data_0",
      "source": "source_0",
      "transform": [
        {"type": "formula", "expr": "toDate(datum[\"date\"])", "as": "date"},
        {
          "field": "date",
          "type": "timeunit",
          "units": ["year", "month", "date", "hours", "minutes"],
          "as": [
            "yearmonthdatehoursminutes_date",
            "yearmonthdatehoursminutes_date_end"
          ]
        }
      ]
    }
  ],
  "marks": [
    {
      "name": "marks",
      "type": "line",
      "style": ["line"],
      "sort": {"field": "datum[\"yearmonthdatehoursminutes_date\"]"},
      "from": {"data": "data_0"},
      "encode": {
        "update": {
          "stroke": {"value": "#4c78a8"},
          "description": {
            "signal": "\"date (year-month-date-hours-minutes): \" + (utcFormat(datum[\"yearmonthdatehoursminutes_date\"], timeUnitSpecifier([\"year\",\"month\",\"date\",\"hours\",\"minutes\"], {\"year-month\":\"%b %Y \",\"year-month-date\":\"%b %d, %Y \"}))) + \"; price: \" + (format(datum[\"price\"], \"\"))"
          },
          "x": {"scale": "x", "field": "yearmonthdatehoursminutes_date"},
          "y": {"scale": "y", "field": "price"},
          "defined": {
            "signal": "isValid(datum[\"yearmonthdatehoursminutes_date\"]) && isFinite(+datum[\"yearmonthdatehoursminutes_date\"]) && isValid(datum[\"price\"]) && isFinite(+datum[\"price\"])"
          }
        }
      }
    }
  ],
  "scales": [
    {
      "name": "x",
      "type": "utc",
      "domain": {"data": "data_0", "field": "yearmonthdatehoursminutes_date"},
      "range": [0, {"signal": "width"}]
    },
    {
      "name": "y",
      "type": "linear",
      "domain": {"data": "data_0", "field": "price"},
      "range": [{"signal": "height"}, 0],
      "nice": true,
      "zero": true
    }
  ],
  "axes": [
    {
      "scale": "x",
      "orient": "bottom",
      "gridScale": "y",
      "grid": true,
      "tickCount": {"signal": "ceil(width/40)"},
      "domain": false,
      "labels": false,
      "aria": false,
      "maxExtent": 0,
      "minExtent": 0,
      "ticks": false,
      "zindex": 0
    },
    {
      "scale": "y",
      "orient": "left",
      "gridScale": "x",
      "grid": true,
      "tickCount": {"signal": "ceil(height/40)"},
      "domain": false,
      "labels": false,
      "aria": false,
      "maxExtent": 0,
      "minExtent": 0,
      "ticks": false,
      "zindex": 0
    },
    {
      "scale": "x",
      "orient": "bottom",
      "grid": false,
      "title": "date (year-month-date-hours-minutes)",
      "labelAngle": 15,
      "format": {
        "signal": "timeUnitSpecifier([\"year\",\"month\",\"date\",\"hours\",\"minutes\"], {\"year-month\":\"%b %Y \",\"year-month-date\":\"%b %d, %Y \"})"
      },
      "labelAlign": "left",
      "labelBaseline": "top",
      "labelFlush": true,
      "labelOverlap": true,
      "tickCount": {"signal": "ceil(width/40)"},
      "zindex": 0
    },
    {
      "scale": "y",
      "orient": "left",
      "grid": false,
      "title": "price",
      "labelOverlap": true,
      "tickCount": {"signal": "ceil(height/40)"},
      "zindex": 0
    }
  ]
}