<!--
{
  "availability" : [
    "iOS: 15.0.0 -",
    "iPadOS: 15.0.0 -",
    "macCatalyst: 15.0.0 -",
    "macOS: 12.0.0 -",
    "tvOS: 15.0.0 -",
    "visionOS: 1.0.0 -",
    "watchOS: 8.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "Foundation",
  "identifier" : "/documentation/Foundation/Date/ISO8601FormatStyle/parse(_:)",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Method",
  "symbol" : {
    "kind" : "Instance Method",
    "modules" : [
      "Foundation"
    ],
    "preciseIdentifier" : "s:10Foundation4DateV18ISO8601FormatStyleV5parseyACSSKF"
  },
  "title" : "parse(_:)"
}
-->

# parse(_:)

Parses a string into a date.

```
func parse(_ value: String) throws -> Date
```

## Parameters

`value`

The string to parse.

## Return Value

An instance of `Date` parsed from the input string.

## Discussion

This method attempts to parse a provided string into an instance of date using the source date format style. The function throws an error if it can’t parse the input string into a date instance.

The date format style guides parsing the date instance from an input string, as the following example illustrates.

```swift
let birthdayFormatStyle = Date.ISO8601FormatStyle()    
    .dateSeparator(.dash)
    .timeSeparator(.colon)
    .year()
    .month()
    .day()
    .time(includingFractionalSeconds: false)

// Create a date instance from a string representation of a date.
let yourBirthdayString = "2021-02-17T14:33:25"
let yourBirthday = try? birthdayFormatStyle.parse(yourBirthdayString)
// Feb 17, 2021 at 8:33 AM
```

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)