# P calendar 16

> Calendar with today button

A shadcn/ui block from the [@coss](https://coss.com/ui) registry, listed on [shadcn.exchange](https://shadcn.exchange/r/coss/p-calendar-16).

- Page, with a live preview: https://shadcn.exchange/r/coss/p-calendar-16
- Screenshot: https://abzjhwgwpdpz7ua5.public.blob.vercel-storage.com/shots/coss/p-calendar-16-light-c0fa5a49af471906.png
- Registry item: https://coss.com/ui/r/p-calendar-16.json
- Categories: calendar, button
- Listed: 2026-10-13, source last changed 2026-10-13

## Install

```bash
npx shadcn@latest add https://coss.com/ui/r/p-calendar-16.json
```

Run it in a project that has shadcn/ui set up. It adds the files below and installs what they depend on.

## Dependencies

- npm packages: `date-fns`
- Registry items: `@coss/calendar`, `@coss/button`

## Files

### `registry/default/particles/p-calendar-16.tsx`

```tsx
"use client";

import { addDays } from "date-fns";
import { useState } from "react";
import { Button } from "@/registry/default/ui/button";
import { Calendar } from "@/registry/default/ui/calendar";

export default function Particle() {
  const today = new Date();
  const selectedDay = addDays(today, -28);
  const [month, setMonth] = useState(selectedDay);
  const [date, setDate] = useState<Date | undefined>(selectedDay);

  return (
    <div className="flex flex-col items-start gap-2">
      <Calendar
        mode="single"
        month={month}
        onMonthChange={setMonth}
        onSelect={setDate}
        selected={date}
      />
      <Button
        onClick={() => {
          setDate(today);
          setMonth(today);
        }}
        size="sm"
        variant="outline"
      >
        Today
      </Button>
    </div>
  );
}
```