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# era(_:)

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

```
func era(_ format: Date.FormatStyle.Symbol.Era = .abbreviated) -> Date.FormatStyle
```

## Parameters

`format`

The era format style applied to the date format style.

## Return Value

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

## Discussion

Possible values of [`Date.FormatStyle.Symbol.Era`](/documentation/Foundation/Date/FormatStyle/Symbol/Era) include [`abbreviated`](/documentation/Foundation/Date/FormatStyle/Symbol/Era/abbreviated), [`narrow`](/documentation/Foundation/Date/FormatStyle/Symbol/Era/narrow), and [`wide`](/documentation/Foundation/Date/FormatStyle/Symbol/Era/wide).

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

```swift
let meetingDate = Date() // Feb 9, 2021 at 3:00 PM
meetingDate.formatted(Date.FormatStyle().era(.abbreviated)) // AD
meetingDate.formatted(Date.FormatStyle().era(.narrow)) // A
meetingDate.formatted(Date.FormatStyle().era(.wide)) // Anno Domini
meetingDate.formatted(Date.FormatStyle().era()) // AD
```

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

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

---

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