diff --git a/README.md b/README.md
index 0e73a6ea36..e8e5e1e752 100755
--- a/README.md
+++ b/README.md
@@ -83,6 +83,7 @@ List of Definitions
 * [i18next](http://i18next.com/) (by [Maarten Docter](https://github.com/mdocter))
 * [iCheck](http://damirfoy.com/iCheck/) (by [Dániel Tar](https://github.com/qcz))
 * [Impress.js](https://github.com/bartaz/impress.js) (by [Boris Yankov](https://github.com/borisyankov))
+* [Intl](http://www.ecma-international.org/ecma-402/1.0/) (by [Jeffery Grajkowski](http://github.com/pushplay))
 * [iScroll](http://cubiq.org/iscroll-4) (by [Boris Yankov](https://github.com/borisyankov))
 * [jake](https://github.com/mde/jake) (by [Kon](http://phyzkit.net/))
 * [Jasmine](http://pivotal.github.com/jasmine/) (by [Boris Yankov](https://github.com/borisyankov))
diff --git a/intl/intl-tests.ts b/intl/intl-tests.ts
new file mode 100644
index 0000000000..d2a9967393
--- /dev/null
+++ b/intl/intl-tests.ts
@@ -0,0 +1,90 @@
+/// <reference path="intl.d.ts" />
+
+// Collator
+
+alert(Intl.Collator.supportedLocalesOf(["ban", "id-u-co-pinyin", "de-ID"], { localeMatcher: "lookup" }).join(", "));
+// → "id-u-co-pinyin, de-ID"
+
+// in German, ä sorts with a
+alert(new Intl.Collator("de").compare("ä", "z").toString());
+// → a negative value
+
+// in Swedish, ä sorts after z
+alert(new Intl.Collator("sv").compare("ä", "z").toString());
+// → a positive value
+
+// in German, ä has a as the base letter
+alert(new Intl.Collator("de", { sensitivity: "base" }).compare("ä", "a").toString());
+// → 0
+
+// in Swedish, ä and a are separate base letters
+alert(new Intl.Collator("sv", { sensitivity: "base" }).compare("ä", "a").toString());
+// → a positive value
+
+var a = ["Offenbach", "Österreich", "Odenwald"];
+var collator = new Intl.Collator("de-u-co-phonebk");
+a.sort(collator.compare);
+alert(a.join(", "));
+// → "Odenwald, Österreich, Offenbach"
+
+
+// DateTimeFormat
+
+alert(Intl.DateTimeFormat.supportedLocalesOf(["ban", "id-u-co-pinyin", "de-ID"], { localeMatcher: "lookup" }).join(", "));
+// → "id-u-co-pinyin, de-ID"
+
+// toLocaleString without arguments depends on the implementation,
+// the default locale, and the default time zone
+alert(new Intl.DateTimeFormat().format(new Date(Date.UTC(2012, 11, 20, 3, 0, 0))));
+// → "12/19/2012" if run in en-US locale with time zone America/Los_Angeles
+
+alert(new Intl.DateTimeFormat("sr-RS", { weekday: "long", year: "numeric", month: "long", day: "numeric" }).format(new Date()));
+// → "недеља, 7. април 2013."
+
+alert([new Date(2012, 08), new Date(2012, 11), new Date(2012, 03)].map(new Intl.DateTimeFormat("pt-BR", { year: "numeric", month: "long" }).format).join("; "));
+// → "setembro de 2012; dezembro de 2012; abril de 2012"
+
+
+// NumberFormat
+
+alert(Intl.NumberFormat.supportedLocalesOf(["ban", "id-u-co-pinyin", "de-ID"], { localeMatcher: "lookup" }).join(", "));
+// → "id-u-co-pinyin, de-ID"
+
+alert(new Intl.NumberFormat("ru-RU", { style: "currency", currency: "RUB" }).format(654321.987));
+// → "654 321,99 руб."
+
+alert([123456.789, 987654.321, 456789.123].map(new Intl.NumberFormat("es-ES").format).join("; "));
+// → "123.456,789; 987.654,321; 456.789,123"
+
+// German uses comma as decimal separator and period for thousands
+alert(new Intl.NumberFormat("de-DE").format(123456.789));
+// → 123.456,789
+
+// Arabic in most Arabic speaking countries uses real Arabic digits
+alert(new Intl.NumberFormat("ar-EG").format(123456.789));
+// → ١٢٣٤٥٦٫٧٨٩
+
+// India uses thousands/lakh/crore separators
+alert(new Intl.NumberFormat("en-IN").format(123456.789));
+// → 1,23,456.789
+
+// the nu extension key requests a numbering system, e.g. Chinese decimal
+alert(new Intl.NumberFormat("zh-Hans-CN-u-nu-hanidec").format(123456.789));
+// → 一二三,四五六.七八九
+
+// when requesting a language that may not be supported, such as
+// Balinese, include a fallback language, in this case Indonesian
+alert(new Intl.NumberFormat(["ban", "id"]).format(123456.789));
+// → 123.456,789
+
+// request a currency format
+alert(new Intl.NumberFormat("de-DE", { style: "currency", currency: "EUR" }).format(123456.789));
+// → 123.456,79 €
+
+// the Japanese yen doesn't use a minor unit
+alert(new Intl.NumberFormat("ja-JP", { style: "currency", currency: "JPY" }).format(123456.789))
+// → ￥123,457
+
+// limit to three significant digits
+alert(new Intl.NumberFormat("en-IN", { maximumSignificantDigits: 3 }).format(123456.789));
+// → 1,23,000
\ No newline at end of file
diff --git a/intl/intl.d.ts b/intl/intl.d.ts
new file mode 100644
index 0000000000..bc3359483e
--- /dev/null
+++ b/intl/intl.d.ts
@@ -0,0 +1,102 @@
+// Type definitions for Intl
+// Project: http://www.ecma-international.org/ecma-402/1.0/
+// Definitions by: Jeffery Grajkowski <http://github.com/pushplay>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+declare module Intl {
+
+    export interface SupportedLocalesOfOptions {
+        localeMatcher?: string;
+    }
+
+    export interface CollatorOptions {
+        localeMatcher?: string;
+        usage?: string;
+        sensitivity?: string;
+        ignorePunctuation?: boolean;
+        numeric?: boolean;
+        caseFirst?: string;
+    }
+
+    export class Collator {
+        constructor(locales?: string, options?: CollatorOptions);
+        constructor(locales?: string[], options?: CollatorOptions);
+        static supportedLocalesOf(locales: string, options?: SupportedLocalesOfOptions): string[];
+        static supportedLocalesOf(locales: string[], options?: SupportedLocalesOfOptions): string[];
+        compare(string1: string, string2: string): number;
+        resolvedOptions(): {
+            locale: string;
+            usage: string;
+            sensitivity: string;
+            ignorePunctuation: boolean;
+            collation: string;
+            numeric: boolean;
+            caseFirst: string;
+        };
+    }
+
+    export interface DateTimeFormatOptions {
+        localeMatcher?: string;
+        timeZone?: string;
+        hour12?: boolean;
+        formatMatcher?: boolean;
+    }
+
+    export class DateTimeFormat {
+        constructor(locales?: string, options?: DateTimeFormatOptions);
+        constructor(locales?: string[], options?: DateTimeFormatOptions);
+        static supportedLocalesOf(locales: string, options?: SupportedLocalesOfOptions): string[];
+        static supportedLocalesOf(locales: string[], options?: SupportedLocalesOfOptions): string[];
+        format(date: Date): string;
+        resolvedOptions(): {
+            locale: string;
+            calendar: string;
+            numberingSystem: string;
+            timeZone: string;
+            hour12?: boolean;
+            weekday?: string;
+            era?: string;
+            year?: string;
+            month?: string;
+            day?: string;
+            hour?: string;
+            minute?: string;
+            second?: string;
+            timeZoneName?: string;
+        };
+    }
+
+    export interface NumberFormatOptions {
+        localeMatcher?: string;
+        style?: string;
+        currency?: string;
+        currencyDisplay?: string;
+        useGrouping?: boolean;
+        minimumIntegerDigits?: number;
+        minimumFractionDigits?: number;
+        maximumFractionDigits?: number;
+        minimumSignificantDigits?: number;
+        maximumSignificantDigits?: number;
+    }
+
+    export class NumberFormat {
+        constructor(locales?: string, options?: NumberFormatOptions);
+        constructor(locales?: string[], options?: NumberFormatOptions);
+        static supportedLocalesOf(locales: string, options?: SupportedLocalesOfOptions): string[];
+        static supportedLocalesOf(locales: string[], options?: SupportedLocalesOfOptions): string[];
+        format(n: number): string;
+        resolvedOptions(): {
+            locale: string;
+            numberingSystem: string;
+            style: string;
+            useGrouping: boolean;
+            currency?: string;
+            currencyDisplay?: string;
+            minimumIntegerDigits?: number;
+            minimumFractionDigits?: number;
+            maximumFractionDigits?: number;
+            minimumSignificantDigits?: number;
+            maximumSignificantDigits?: number;
+        }
+    }
+}
\ No newline at end of file