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# day(_:)

Modifies the date format style to use the specified day format style.

```
func day(_ format: Date.FormatStyle.Symbol.Day = .defaultDigits) -> Date.FormatStyle
```

## Parameters

`format`

The day format style applied to the date format style.

## Return Value

A date format style modified to include the specified day style.

## Discussion

Possible values of [`Date.FormatStyle.Symbol.Day`](/documentation/Foundation/Date/FormatStyle/Symbol/Day) are [`defaultDigits`](/documentation/Foundation/Date/FormatStyle/Symbol/Day/defaultDigits), [`ordinalOfDayInMonth`](/documentation/Foundation/Date/FormatStyle/Symbol/Day/ordinalOfDayInMonth), and [`twoDigits`](/documentation/Foundation/Date/FormatStyle/Symbol/Day/twoDigits).

This example shows a variety of [`Date.FormatStyle.Symbol.Day`](/documentation/Foundation/Date/FormatStyle/Symbol/Day) formats applied to a date:

```swift
let meetingDate = Date() // Feb 9, 2021 at 3:00 PM
meetingDate.formatted(Date.FormatStyle().day(.defaultDigits)) // 9
meetingDate.formatted(Date.FormatStyle().day(.ordinalOfDayInMonth)) // 2 (second Tuesday of the month)
meetingDate.formatted(Date.FormatStyle().day(.twoDigits)) // 09
meetingDate.formatted(Date.FormatStyle().day()) // 9
```

If you don’t provide a format, the [`defaultDigits`](/documentation/Foundation/Date/FormatStyle/Symbol/Day/defaultDigits) static variable is the default format.

For more information about formatting dates, see [`Date.FormatStyle`](/documentation/Foundation/Date/FormatStyle).

---

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