# Calendar: Week numbers

> `showWeekNumber` adds a week column. `ISOWeek` uses ISO numbering, starting on Monday. `showOutsideDays={false}` hides days of other months.

Example: https://hextaui.com/docs/calendar/examples/week-numbers
Component docs: https://hextaui.com/docs/calendar.md

## Add this example

```bash
npx shadcn@latest add https://hextaui.com/r/calendar-week-numbers.json
```

This adds `components/examples/calendar/week-numbers.tsx` with the Calendar component and the HextaUI theme tokens.

## Source

```tsx title="components/examples/calendar/week-numbers.tsx"
import { Calendar } from "@/components/ui/calendar"

export function CalendarWeekNumbers() {
  return (
    <div className="w-fit max-w-full overflow-x-auto rounded-xl border">
      <Calendar mode="range" showWeekNumber ISOWeek showOutsideDays={false} />
    </div>
  )
}
```

## Props in this example

### Calendar

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `mode` | `"single" \| "multiple" \| "range"` | – | Without a mode, days are not selectable. |
| `showOutsideDays` | `boolean` | `true` | HextaUI default. |
| `showWeekNumber` | `boolean` | `false` |  |
| `ISOWeek` | `boolean` | `false` |  |

## More Calendar examples

- [Range](https://hextaui.com/docs/calendar/examples/range.md)
- [Range limits](https://hextaui.com/docs/calendar/examples/range-limits.md)
- [Multiple](https://hextaui.com/docs/calendar/examples/multiple.md)
- [Month and year dropdowns](https://hextaui.com/docs/calendar/examples/dropdowns.md)
- [Bounded](https://hextaui.com/docs/calendar/examples/bounded.md)
- [Controlled month](https://hextaui.com/docs/calendar/examples/controlled.md)
- [Fixed today](https://hextaui.com/docs/calendar/examples/fixed-today.md)
- [Inside a sheet](https://hextaui.com/docs/calendar/examples/sheet.md)
- [Right to left](https://hextaui.com/docs/calendar/examples/rtl.md)