---
title: "time(includingFractionalSeconds:)"
framework: foundation
role: symbol
role_heading: Instance Method
path: "foundation/date/iso8601formatstyle/time(includingfractionalseconds:)"
---

# time(includingFractionalSeconds:)

Modifies the ISO 8601 date format style to include the time in the formatted output.

## Declaration

```swift
func time(includingFractionalSeconds: Bool) -> Date.ISO8601FormatStyle
```

## Parameters

- `includingFractionalSeconds`: Specifies whether the format style inclues the fractional component of the seconds.

## Return Value

Return Value An ISO 8601 date format style modified to include the time.

## Discussion

Discussion The following example shows an ISO 8601 format with, and without, a time and fractional seconds. let meetingDate = Date() // Jun 24, 2021 at 6:52 AM meetingDate.formatted(.iso8601     .year()     .month()     .day()     .time(includingFractionalSeconds: false) ) // 20210624T115209

meetingDate.formatted(.iso8601     .year()     .time(includingFractionalSeconds: true) ) // 2021T115209.274

meetingDate.formatted(.iso8601     .year()     .year()     .month()     .day()     .dateSeparator(.dash)     .time(includingFractionalSeconds: true)     .timeSeparator(.colon) ) // 2021-06-24T11:52:09.274

meetingDate.formatted(.iso8601     .year()     .year()     .month()     .day()     .dateSeparator(.dash)     .time(includingFractionalSeconds: false)     .timeSeparator(.colon)     .dateTimeSeparator(.space) ) // 2021-06-24 11:52:09 The default Date.ISO8601FormatStyle includes the time but not the fractional seconds. For more information about formatting dates, see the Date.FormatStyle.

## See Also

### Modifying Times in an ISO 8601 Format Style

- [timeSeparator(_:)](foundation/date/iso8601formatstyle/timeseparator(_:).md)
- [timeZone(separator:)](foundation/date/iso8601formatstyle/timezone(separator:).md)
- [timeZoneSeparator(_:)](foundation/date/iso8601formatstyle/timezoneseparator(_:).md)