---
title: "dateSeparator(_:)"
framework: foundation
role: symbol
role_heading: Instance Method
path: "foundation/date/iso8601formatstyle/dateseparator(_:)"
---

# dateSeparator(_:)

Modifies the ISO 8601 date format style to use the specified date separator.

## Declaration

```swift
func dateSeparator(_ separator: Date.ISO8601FormatStyle.DateSeparator) -> Date.ISO8601FormatStyle
```

## Parameters

- `separator`: Character used to separate the year, month, and day in a date.

## Return Value

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

## Discussion

Discussion Possible values of Date.ISO8601FormatStyle.DateSeparator are Date.ISO8601FormatStyle.DateSeparator.dash and Date.ISO8601FormatStyle.DateSeparator.omitted. The following example shows a variety of Date.ISO8601FormatStyle.DateSeparator formats applied to an ISO 8601 date format. let meetingDate = Date() // Jun 23, 2021 at 6:13 AM meetingDate.formatted(.iso8601.dateSeparator(.omitted)) // 20210623T111325Z meetingDate.formatted(.iso8601.dateSeparator(.dash)) // 2021-06-23T111325Z meetingDate.formatted(.iso8601) // 20210623T111325Z If no format is specified as a parameter, the Date.ISO8601FormatStyle.DateSeparator.omitted case is the default format. For more information about ISO 8601 formatted dates, see the Date.ISO8601FormatStyle.

## See Also

### Modifying Dates in an ISO 8601 Format Style

- [year()](foundation/date/iso8601formatstyle/year().md)
- [month()](foundation/date/iso8601formatstyle/month().md)
- [weekOfYear()](foundation/date/iso8601formatstyle/weekofyear().md)
- [day()](foundation/date/iso8601formatstyle/day().md)