diff --git a/types/ultra-strftime/index.d.ts b/types/ultra-strftime/index.d.ts
new file mode 100644
index 0000000000..f02d27d43f
--- /dev/null
+++ b/types/ultra-strftime/index.d.ts
@@ -0,0 +1,59 @@
+// Type definitions for ultra-strftime 1.0
+// Project: https://github.com/xio4/ultra_strftime
+// Definitions by: Piotr Roszatycki <https://github.com/dex4er>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+declare function strftime(fmt: string, d?: Date, locale?: strftime.Locale, options?: strftime.Options): string;
+declare function strftime(fmt: string, locale?: strftime.Locale, options?: strftime.Options): string;
+
+declare namespace strftime {
+    type StrftimeFunction = (fmt: string, d?: Date, options?: Options) => string;
+
+    interface LocaleFormats {
+        /** equivalent to %m/%d/%y in en_US */
+        D: string;
+        /** equivalent to %Y-%m-%d in en_US */
+        F: string;
+        /** equivalent to %H:%M in en_US */
+        R: string;
+        /** equivalent to %D in en_US */
+        X: string;
+        /** equivalent to %a %b %d %X %Y %Z in en_US */
+        c: string;
+        /** equivalent to %I:%M:%S %p in en_US */
+        r: string;
+        /** equivalent to %H:%M:%S in en_US */
+        T: string;
+        /** equivalent to %e-%b-%Y in en_US */
+        v: string;
+        /** equivalent to %T in en_US */
+        x: string;
+    }
+
+    interface Locale {
+        days: string[];
+        shortDays: string[];
+        months: string[];
+        shortMonths: string[];
+        AM: string;
+        PM: string;
+        am: string;
+        pm: string;
+        formats: LocaleFormats;
+    }
+
+    interface Options {
+        timezone?: string | number;
+        utc?: boolean;
+    }
+
+    function strftimeUTC(fmt: string, d?: Date, locale?: Locale): string;
+    function strftimeTZ(fmt: string, d: Date, locale: Locale, timezone: number): string;
+    function strftimeTZ(fmt: string, d: Date, timezone: number): string;
+    function localizedStrftime(locale: Locale): StrftimeFunction;
+
+    function strftime(fmt: string, d?: Date, locale?: Locale, options?: Options): string;
+    function strftime(fmt: string, locale?: Locale, options?: Options): string;
+}
+
+export = strftime;
diff --git a/types/ultra-strftime/tsconfig.json b/types/ultra-strftime/tsconfig.json
new file mode 100644
index 0000000000..3b9461c0b6
--- /dev/null
+++ b/types/ultra-strftime/tsconfig.json
@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "ultra-strftime-tests.ts"
+    ]
+}
\ No newline at end of file
diff --git a/types/ultra-strftime/tslint.json b/types/ultra-strftime/tslint.json
new file mode 100644
index 0000000000..e60c15844f
--- /dev/null
+++ b/types/ultra-strftime/tslint.json
@@ -0,0 +1,3 @@
+{
+    "extends": "dtslint/dt.json"
+}
\ No newline at end of file
diff --git a/types/ultra-strftime/ultra-strftime-tests.ts b/types/ultra-strftime/ultra-strftime-tests.ts
new file mode 100644
index 0000000000..4439425663
--- /dev/null
+++ b/types/ultra-strftime/ultra-strftime-tests.ts
@@ -0,0 +1,41 @@
+import * as strftime from "ultra-strftime";
+
+const it_IT = {
+    days: ['domenica', 'lunedi', 'martedi', 'mercoledi', 'giovedi', 'venerdi', 'sabato'],
+    shortDays: ['dom', 'lun', 'mar', 'mer', 'gio', 'ven', 'sab'],
+    months: ['gennaio', 'febbraio', 'marzo', 'aprile', 'maggio', 'giugno', 'luglio', 'agosto', 'settembre', 'ottobre', 'novembre', 'dicembre'],
+    shortMonths: ['gen', 'feb', 'mar', 'apr', 'mag', 'giu', 'lug', 'ago', 'set', 'ott', 'nov', 'dic'],
+    AM: 'AM',
+    PM: 'PM',
+    am: 'am',
+    pm: 'pm',
+    formats: {
+        D: '%m/%d/%y',
+        F: '%Y-%m-%d',
+        R: '%H:%M',
+        X: '%T',
+        c: '%a %b %d %X %Y',
+        r: '%I:%M:%S %p',
+        T: '%H:%M:%S',
+        v: '%e-%b-%Y',
+        x: '%D'
+    }
+};
+
+strftime('%B %d, %Y %H:%M:%S');
+strftime('%B %d, %Y %H:%M:%S', new Date(1307472705067));
+strftime('%B %d, %Y %H:%M:%S', new Date(1307472705067), it_IT);
+strftime('%B %d, %Y %H:%M:%S', new Date(1307472705067), it_IT, { timezone: -420 });
+strftime('%B %d, %Y %H:%M:%S', new Date(1307472705067), it_IT, { timezone: '-0700' });
+strftime('%B %d, %Y %H:%M:%S', new Date(1307472705067), it_IT, { utc: true });
+
+const strftimeIT = strftime.localizedStrftime(it_IT);
+strftimeIT('%B %d, %Y %H:%M:%S');
+strftimeIT('%B %d, %Y %H:%M:%S', new Date(1307472705067));
+
+strftime.strftimeUTC('%B %d, %y %H:%M:%S', new Date(1307472705067), it_IT);
+strftime.strftimeUTC('%B %d, %y %H:%M:%S', new Date(1307472705067));
+strftime.strftimeUTC('%B %d, %y %H:%M:%S');
+
+strftime.strftimeTZ('%B %d, %y %H:%M:%S', new Date(1307472705067), it_IT, -420);
+strftime.strftimeTZ('%B %d, %y %H:%M:%S', new Date(1307472705067), -420);