# iso8601 A regex component that matches a default ISO 8601-formatted date string, capturing it as a Foundation date. ``` static var iso8601: Date.ISO8601FormatStyle { get } ``` ## Discussion This property matches date substrings in accordance with the formatting of Foundation’s . This matches the default format of the ISO 8601 format style. The following example creates a [`Regex`](/documentation/Swift/Regex) that matches a date formatted with the base ISO 8601 format. It then matches this regex against a source string containing a date and time with this format (using the default UTC time zone, which `Z` indicates), some whitespace, a substring, more whitespace, and a currency value. ``` let iso860Source = "2022-07-14T21:10:15Z Lemon-lime slushie $1.99" let matcher = Regex { Capture { One(.iso8601) } OneOrMore(.horizontalWhitespace) OneOrMore(.any) OneOrMore(.horizontalWhitespace) One(.localizedCurrency(code:Locale.Currency("USD"), locale:Locale(identifier: "en_US"))) } let match = iso860Source.firstMatch(of: matcher) let date = match?.1 // date == Jul 14, 2022 at 2:10 PM PST ``` --- Copyright © 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)