---
title: Calendar
description: A date field component that allows users to enter and edit date.
component: true
links:
  doc: https://react-day-picker.js.org
---

<ComponentPreview
  name="calendar-demo"
  title="Calendar"
  description="A calendar showing the current date."
/>

## Blocks

We have built a collection of 30+ calendar blocks that you can use to build your own calendar components.

See all calendar blocks in the [Blocks Library](/blocks/calendar) page.

## Installation

<CodeTabs>

<TabsList>
  <TabsTrigger value="cli">CLI</TabsTrigger>
  <TabsTrigger value="manual">Manual</TabsTrigger>
</TabsList>
<TabsContent value="cli">

```bash
npx shadcn@latest add calendar
```

</TabsContent>

<TabsContent value="manual">

<Steps>

<Step>Install the following dependencies:</Step>

```bash
npm install react-day-picker date-fns
```

<Step>Add the `Button` component to your project.</Step>

The `Calendar` component uses the `Button` component. Make sure you have it installed in your project.

<Step>Copy and paste the following code into your project.</Step>

<ComponentSource name="calendar" title="components/ui/calendar.tsx" />

<Step>Update the import paths to match your project setup.</Step>

</Steps>

</TabsContent>

</CodeTabs>

## Usage

```tsx showLineNumbers
import { Calendar } from "@/components/ui/calendar"
```

```tsx showLineNumbers
const [date, setDate] = React.useState<Date | undefined>(new Date())

return (
  <Calendar
    mode="single"
    selected={date}
    onSelect={setDate}
    className="rounded-lg border"
  />
)
```

See the [React DayPicker](https://react-day-picker.js.org) documentation for more information.

## About

The `Calendar` component is built on top of [React DayPicker](https://react-day-picker.js.org).

## Customization

See the [React DayPicker](https://react-day-picker.js.org/docs/customization) documentation for more information on how to customize the `Calendar` component.

## Date Picker

You can use the `<Calendar>` component to build a date picker. See the [Date Picker](/docs/components/date-picker) page for more information.

## Persian / Hijri / Jalali Calendar

To use the Persian calendar, edit `components/ui/calendar.tsx` and replace `react-day-picker` with `react-day-picker/persian`.

```diff
- import { DayPicker } from "react-day-picker"
+ import { DayPicker } from "react-day-picker/persian"
```

<ComponentPreview
  name="calendar-hijri"
  title="Persian / Hijri / Jalali Calendar"
  description="A Persian calendar."
/>

## Selected Date (With TimeZone)

The Calendar component accepts a `timeZone` prop to ensure dates are displayed and selected in the user's local timezone.

```tsx showLineNumbers
export function CalendarWithTimezone() {
  const [date, setDate] = React.useState<Date | undefined>(undefined)
  const [timeZone, setTimeZone] = React.useState<string | undefined>(undefined)

  React.useEffect(() => {
    setTimeZone(Intl.DateTimeFormat().resolvedOptions().timeZone)
  }, [])

  return (
    <Calendar
      mode="single"
      selected={date}
      onSelect={setDate}
      timeZone={timeZone}
    />
  )
}
```

**Note:** If you notice a selected date offset (for example, selecting the 20th highlights the 19th), make sure the `timeZone` prop is set to the user's local timezone.

**Why client-side?** The timezone is detected using `Intl.DateTimeFormat().resolvedOptions().timeZone` inside a `useEffect` to ensure compatibility with server-side rendering. Detecting the timezone during render would cause hydration mismatches, as the server and client may be in different timezones.

## Examples

### Range Calendar

<ComponentPreview
  name="calendar-05"
  title="Range Calendar"
  description="A calendar showing the current date and range selection."
  className="**:[.preview]:h-auto lg:**:[.preview]:h-[450px]"
/>

### Month and Year Selector

<ComponentPreview
  name="calendar-13"
  title="Month and Year Selector"
  description="A calendar with month and year dropdowns."
/>

### Date of Birth Picker

<ComponentPreview
  name="calendar-22"
  title="Date of Birth Picker"
  description="A calendar with date of birth picker."
/>

### Date and Time Picker

<ComponentPreview
  name="calendar-24"
  title="Date and Time Picker"
  description="A calendar with date and time picker."
/>

### Natural Language Picker

This component uses the `chrono-node` library to parse natural language dates.

<ComponentPreview
  name="calendar-29"
  title="Natural Language Picker"
  description="A calendar with natural language picker."
/>

### Custom Cell Size

<ComponentPreview
  name="calendar-18"
  title="Custom Cell Size"
  description="A calendar with custom cell size that's responsive."
  className="**:[.preview]:h-[560px]"
/>

You can customize the size of calendar cells using the `--cell-size` CSS variable. You can also make it responsive by using breakpoint-specific values:

```tsx showLineNumbers
<Calendar
  mode="single"
  selected={date}
  onSelect={setDate}
  className="rounded-lg border [--cell-size:--spacing(11)] md:[--cell-size:--spacing(12)]"
/>
```

Or use fixed values:

```tsx showLineNumbers
<Calendar
  mode="single"
  selected={date}
  onSelect={setDate}
  className="rounded-lg border [--cell-size:2.75rem] md:[--cell-size:3rem]"
/>
```

## Upgrade Guide

### Tailwind v4

If you're already using Tailwind v4, you can upgrade to the latest version of the `Calendar` component by running the following command:

```bash
npx shadcn@latest add calendar
```

When you're prompted to overwrite the existing `Calendar` component, select `Yes`. **If you have made any changes to the `Calendar` component, you will need to merge your changes with the new version.**

This will update the `Calendar` component and `react-day-picker` to the latest version.

Next, follow the [React DayPicker](https://daypicker.dev/upgrading) upgrade guide to upgrade your existing components to the latest version.

#### Installing Blocks

After upgrading the `Calendar` component, you can install the new blocks by running the `shadcn@latest add` command.

```bash
npx shadcn@latest add calendar-02
```

This will install the latest version of the calendar blocks.

### Tailwind v3

If you're using Tailwind v3, you can upgrade to the latest version of the `Calendar` by copying the following code to your `calendar.tsx` file.

<CodeCollapsibleWrapper>

```tsx showLineNumbers title="components/ui/calendar.tsx"
"use client"

import * as React from "react"
import {
  ChevronDownIcon,
  ChevronLeftIcon,
  ChevronRightIcon,
} from "lucide-react"
import { DayButton, DayPicker, getDefaultClassNames } from "react-day-picker"

import { cn } from "@/lib/utils"
import { Button, buttonVariants } from "@/components/ui/button"

function Calendar({
  className,
  classNames,
  showOutsideDays = true,
  captionLayout = "label",
  buttonVariant = "ghost",
  formatters,
  components,
  ...props
}: React.ComponentProps<typeof DayPicker> & {
  buttonVariant?: React.ComponentProps<typeof Button>["variant"]
}) {
  const defaultClassNames = getDefaultClassNames()

  return (
    <DayPicker
      showOutsideDays={showOutsideDays}
      className={cn(
        "bg-background group/calendar p-3 [--cell-size:2rem] [[data-slot=card-content]_&]:bg-transparent [[data-slot=popover-content]_&]:bg-transparent",
        String.raw`rtl:**:[.rdp-button\_next>svg]:rotate-180`,
        String.raw`rtl:**:[.rdp-button\_previous>svg]:rotate-180`,
        className
      )}
      captionLayout={captionLayout}
      formatters={{
        formatMonthDropdown: (date) =>
          date.toLocaleString("default", { month: "short" }),
        ...formatters,
      }}
      classNames={{
        root: cn("w-fit", defaultClassNames.root),
        months: cn(
          "relative flex flex-col gap-4 md:flex-row",
          defaultClassNames.months
        ),
        month: cn("flex w-full flex-col gap-4", defaultClassNames.month),
        nav: cn(
          "absolute inset-x-0 top-0 flex w-full items-center justify-between gap-1",
          defaultClassNames.nav
        ),
        button_previous: cn(
          buttonVariants({ variant: buttonVariant }),
          "h-[--cell-size] w-[--cell-size] select-none p-0 aria-disabled:opacity-50",
          defaultClassNames.button_previous
        ),
        button_next: cn(
          buttonVariants({ variant: buttonVariant }),
          "h-[--cell-size] w-[--cell-size] select-none p-0 aria-disabled:opacity-50",
          defaultClassNames.button_next
        ),
        month_caption: cn(
          "flex h-[--cell-size] w-full items-center justify-center px-[--cell-size]",
          defaultClassNames.month_caption
        ),
        dropdowns: cn(
          "flex h-[--cell-size] w-full items-center justify-center gap-1.5 text-sm font-medium",
          defaultClassNames.dropdowns
        ),
        dropdown_root: cn(
          "has-focus:border-ring border-input shadow-xs has-focus:ring-ring/50 has-focus:ring-[3px] relative rounded-md border",
          defaultClassNames.dropdown_root
        ),
        dropdown: cn("absolute inset-0 opacity-0", defaultClassNames.dropdown),
        caption_label: cn(
          "select-none font-medium",
          captionLayout === "label"
            ? "text-sm"
            : "[&>svg]:text-muted-foreground flex h-8 items-center gap-1 rounded-md pl-2 pr-1 text-sm [&>svg]:size-3.5",
          defaultClassNames.caption_label
        ),
        table: "w-full border-collapse",
        weekdays: cn("flex", defaultClassNames.weekdays),
        weekday: cn(
          "text-muted-foreground flex-1 select-none rounded-md text-[0.8rem] font-normal",
          defaultClassNames.weekday
        ),
        week: cn("mt-2 flex w-full", defaultClassNames.week),
        week_number_header: cn(
          "w-[--cell-size] select-none",
          defaultClassNames.week_number_header
        ),
        week_number: cn(
          "text-muted-foreground select-none text-[0.8rem]",
          defaultClassNames.week_number
        ),
        day: cn(
          "relative w-full h-full p-0 text-center [&:last-child[data-selected=true]_button]:rounded-r-md group/day aspect-square select-none",
          props.showWeekNumber
            ? "[&:nth-child(2)[data-selected=true]_button]:rounded-l-md"
            : "[&:first-child[data-selected=true]_button]:rounded-l-md",
          defaultClassNames.day
        ),
        range_start: cn(
          "bg-accent rounded-l-md",
          defaultClassNames.range_start
        ),
        range_middle: cn("rounded-none", defaultClassNames.range_middle),
        range_end: cn("bg-accent rounded-r-md", defaultClassNames.range_end),
        today: cn(
          "bg-accent text-accent-foreground rounded-md data-[selected=true]:rounded-none",
          defaultClassNames.today
        ),
        outside: cn(
          "text-muted-foreground aria-selected:text-muted-foreground",
          defaultClassNames.outside
        ),
        disabled: cn(
          "text-muted-foreground opacity-50",
          defaultClassNames.disabled
        ),
        hidden: cn("invisible", defaultClassNames.hidden),
        ...classNames,
      }}
      components={{
        Root: ({ className, rootRef, ...props }) => {
          return (
            <div
              data-slot="calendar"
              ref={rootRef}
              className={cn(className)}
              {...props}
            />
          )
        },
        Chevron: ({ className, orientation, ...props }) => {
          if (orientation === "left") {
            return (
              <ChevronLeftIcon className={cn("size-4", className)} {...props} />
            )
          }

          if (orientation === "right") {
            return (
              <ChevronRightIcon
                className={cn("size-4", className)}
                {...props}
              />
            )
          }

          return (
            <ChevronDownIcon className={cn("size-4", className)} {...props} />
          )
        },
        DayButton: CalendarDayButton,
        WeekNumber: ({ children, ...props }) => {
          return (
            <td {...props}>
              <div className="flex size-[--cell-size] items-center justify-center text-center">
                {children}
              </div>
            </td>
          )
        },
        ...components,
      }}
      {...props}
    />
  )
}

function CalendarDayButton({
  className,
  day,
  modifiers,
  ...props
}: React.ComponentProps<typeof DayButton>) {
  const defaultClassNames = getDefaultClassNames()

  const ref = React.useRef<HTMLButtonElement>(null)
  React.useEffect(() => {
    if (modifiers.focused) ref.current?.focus()
  }, [modifiers.focused])

  return (
    <Button
      ref={ref}
      variant="ghost"
      size="icon"
      data-day={day.date.toLocaleDateString()}
      data-selected-single={
        modifiers.selected &&
        !modifiers.range_start &&
        !modifiers.range_end &&
        !modifiers.range_middle
      }
      data-range-start={modifiers.range_start}
      data-range-end={modifiers.range_end}
      data-range-middle={modifiers.range_middle}
      className={cn(
        "data-[selected-single=true]:bg-primary data-[selected-single=true]:text-primary-foreground data-[range-middle=true]:bg-accent data-[range-middle=true]:text-accent-foreground data-[range-start=true]:bg-primary data-[range-start=true]:text-primary-foreground data-[range-end=true]:bg-primary data-[range-end=true]:text-primary-foreground group-data-[focused=true]/day:border-ring group-data-[focused=true]/day:ring-ring/50 flex aspect-square h-auto w-full min-w-[--cell-size] flex-col gap-1 font-normal leading-none data-[range-end=true]:rounded-md data-[range-middle=true]:rounded-none data-[range-start=true]:rounded-md group-data-[focused=true]/day:relative group-data-[focused=true]/day:z-10 group-data-[focused=true]/day:ring-[3px] [&>span]:text-xs [&>span]:opacity-70",
        defaultClassNames.day,
        className
      )}
      {...props}
    />
  )
}

export { Calendar, CalendarDayButton }
```

</CodeCollapsibleWrapper>

**If you have made any changes to the `Calendar` component, you will need to merge your changes with the new version.**

Then follow the [React DayPicker](https://daypicker.dev/upgrading) upgrade guide to upgrade your dependencies and existing components to the latest version.

#### Installing Blocks

After upgrading the `Calendar` component, you can install the new blocks by running the `shadcn@latest add` command.

```bash
npx shadcn@latest add calendar-02
```

This will install the latest version of the calendar blocks.

## Changelog

### 2025-10-26 Fixed day radius with week numbers

We have fixed an issue where the selected day's left border radius was not applied correctly when week numbers were displayed. The fix ensures that when `showWeekNumber` is enabled, the first day (which is the second child due to the week number column) correctly receives the rounded left border.

To apply this fix, edit `components/ui/calendar.tsx` and update the `day` class in `classNames`:

```tsx showLineNumbers title="components/ui/calendar.tsx" {5-7}
classNames={{
  // ... other classNames
  day: cn(
    "relative w-full h-full p-0 text-center [&:last-child[data-selected=true]_button]:rounded-r-md group/day aspect-square select-none",
    props.showWeekNumber
      ? "[&:nth-child(2)[data-selected=true]_button]:rounded-l-md"
      : "[&:first-child[data-selected=true]_button]:rounded-l-md",
    defaultClassNames.day
  ),
  // ... other classNames
}}
```
