# Utilization per day, 4 weeks (calendar) (Medicine & practice example)

> WestCoast Charts 1.1.5, release, public Core release, on npm. HTML: https://westcoast-charts.com/gallery/medical/util-calendar/ · Index for agents: https://westcoast-charts.com/llms.txt

Daily values from schedule.utilization() with day buckets; weekends closed: hatched, own legend entry, tooltip “closed”.

- Chart type: `calendar` (Calendar)
- Collection: Medicine & practice · Medicine & practice
- Raw configuration: https://westcoast-charts.com/gallery-src/medical/util-calendar.js
- Standalone example: https://westcoast-charts.com/embed/samples/wcc/premium/medical.html?only=util-calendar&lang=en#v-util-calendar

## Setup

```js
import WestCoastCharts from 'west-coast-charts'
import types from 'west-coast-charts/types'
import premium from 'west-coast-charts/premium'
import vitals from 'west-coast-charts/layers/vitals'
import schedule from 'west-coast-charts/layers/schedule'

WestCoastCharts.use(types).use(premium).use(vitals).use(schedule)
const WestCoastChartsPremium = premium
const WestCoastChartsLayer_vitals = vitals
const WestCoastChartsLayer_schedule = schedule
WestCoastCharts.setLicenseKey(LICENCE_KEY) // paid production licence; localhost evaluation needs no key
```

## Options

```js
const options = {
  "chart": {
    "type": "calendar",
    "height": 340
  },
  "series": [
    {
      "name": "Utilization %",
      "data": [
        {
          "x": "2026-10-26",
          "y": 42
        },
        {
          "x": "2026-10-27",
          "y": 40
        },
        {
          "x": "2026-10-28",
          "y": 41
        },
        {
          "x": "2026-10-29",
          "y": 40
        },
        {
          "x": "2026-10-30",
          "y": 39
        },
        {
          "x": "2026-11-02",
          "y": 32
        },
        {
          "x": "2026-11-03",
          "y": 29
        },
        {
          "x": "2026-11-04",
          "y": 31
        },
        {
          "x": "2026-11-05",
          "y": 31
        },
        {
          "x": "2026-11-06",
          "y": 29
        },
        {
          "x": "2026-11-09",
          "y": 33
        },
        {
          "x": "2026-11-10",
          "y": 32
        },
        {
          "x": "2026-11-11",
          "y": 33
        },
        {
          "x": "2026-11-12",
          "y": 32
        },
        {
          "x": "2026-11-13",
          "y": 32
        },
        {
          "x": "2026-11-16",
          "y": 35
        },
        {
          "x": "2026-11-17",
          "y": 33
        },
        {
          "x": "2026-11-18",
          "y": 34
        },
        {
          "x": "2026-11-19",
          "y": 33
        },
        {
          "x": "2026-11-20",
          "y": 32
        }
      ]
    }
  ],
  "plotOptions": {
    "calendar": {
      "start": "2026-10-26",
      "end": "2026-11-22"
    },
    "heatmap": {
      "colorScale": {
        "ranges": [
          {
            "from": 0,
            "to": 49.9,
            "color": "#bfdbfe",
            "name": "< 50 %"
          },
          {
            "from": 50,
            "to": 79.9,
            "color": "#60a5fa",
            "name": "50–80 %"
          },
          {
            "from": 80,
            "to": 94.9,
            "color": "#2563eb",
            "name": "80–95 %"
          },
          {
            "from": 95,
            "to": 100,
            "color": "#1e3a8a",
            "name": "≥ 95 %"
          }
        ]
      },
      "empty": {
        "label": "closed"
      }
    }
  },
  "legend": {
    "show": true,
    "position": "bottom"
  }
}

const chart = new WestCoastCharts(document.querySelector('#chart'), options)
await chart.render()
```

## Verify

- Text check (Library 1.1.5): load `west-coast-charts/agent/describe` and call `chart.describe({ format: "json" })` for the actual drawn state. The live reader is on this example’s HTML page.
- Command line (Public agent tools 0.2.3, tested with Library 1.1.5; available from the versioned GitHub release and npm, https://westcoast-charts.com/docs/cli/index.md): `wcc chart export medical-util-calendar.json --out medical-util-calendar.svg --with-table` (save the options above as JSON first)