diff --git a/types/moment-business-time/index.d.ts b/types/moment-business-time/index.d.ts
new file mode 100644
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+++ b/types/moment-business-time/index.d.ts
@@ -0,0 +1,41 @@
+// Type definitions for moment-business-time 0.7
+// Project: https://github.com/lennym/moment-business-time
+// Definitions by: Tomasz Nguyen <https://github.com/swist>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/*~ On this line, import the module which this module adds to */
+import * as moment from 'moment';
+
+/*~ Here, declare the same module as the one you imported above */
+declare module 'moment' {
+    interface Moment {
+        nextWorkingDay: () => Moment;
+        nextWorkingTime: () => Moment;
+
+        lastWorkingDay: () => Moment;
+        lastWorkingTime: () => Moment;
+
+        addWorkingTime: (...args: Array<number | unitOfTime.Base>) => Moment;
+        subtractWorkingTime: (...args: Array<number | unitOfTime.Base>) => Moment;
+
+        workingDiff: (moment: Moment, unit: unitOfTime.Base, fractions?: boolean) => Moment;
+
+        isWorkingDay: () => boolean;
+        isWorkingTime: () => boolean;
+    }
+
+    interface WorkingHoursMap {
+        0: string[] | null;
+        1: string[] | null;
+        2: string[] | null;
+        3: string[] | null;
+        4: string[] | null;
+        5: string[] | null;
+        6: string[] | null;
+    }
+
+    interface LocaleSpecification {
+        workinghours?: WorkingHoursMap;
+        holidays?: string[];
+    }
+}
diff --git a/types/moment-business-time/moment-business-time-tests.ts b/types/moment-business-time/moment-business-time-tests.ts
new file mode 100644
index 0000000000..79f25a720a
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+++ b/types/moment-business-time/moment-business-time-tests.ts
@@ -0,0 +1,56 @@
+import * as moment from 'moment';
+import 'moment-business-time';
+
+moment('2015-02-28T10:00:00Z').nextWorkingDay();
+moment('2015-02-28T20:00:00Z').nextWorkingDay();
+moment('2015-02-28T10:00:00Z').nextWorkingTime();
+moment('2015-02-28T20:00:00Z').nextWorkingTime();
+moment('2015-02-28T10:00:00Z').lastWorkingDay();
+// Fri Feb 27 2015 10:00:00 GMT+0000
+moment('2015-02-28T20:00:00Z').lastWorkingDay();
+// Fri Feb 27 2015 20:00:00 GMT+0000
+moment('2015-02-27T10:00:00Z').addWorkingTime(5, 'hours');
+// Fri Feb 27 2015 15:00:00 GMT+0000
+moment('2015-02-28T10:00:00Z').addWorkingTime(5, 'hours');
+// Mon Mar 02 2015 14:00:00 GMT+0000
+moment('2015-02-27T10:00:00Z').addWorkingTime(5, 'hours', 30, 'minutes');
+// Fri Feb 27 2015 15:30:00 GMT+0000
+moment('2015-02-27T16:00:00Z').subtractWorkingTime(5, 'hours');
+// Fri Feb 27 2015 11:00:00 GMT+0000
+moment('2015-02-28T16:00:00Z').subtractWorkingTime(5, 'hours');
+// Fri Feb 27 2015 12:00:00 GMT+0000
+moment('2015-02-27T16:00:00Z').subtractWorkingTime(5, 'hours', 30, 'minutes');
+// Fri Feb 27 2015 10:30:00 GMT+0000
+moment('2015-02-27T16:30:00Z').workingDiff(moment('2015-02-26T12:00:00Z'), 'hours');
+// 12
+moment('2015-02-27T16:30:00Z').workingDiff(moment('2015-02-26T12:00:00Z'), 'hours', true);
+// 12.5
+// set opening time to 09:30 and close early on Wednesdays
+moment.updateLocale('en', {
+    workinghours: {
+        0: null,
+        1: ['09:30:00', '17:00:00'],
+        2: ['09:30:00', '17:00:00'],
+        3: ['09:30:00', '13:00:00'],
+        4: ['09:30:00', '17:00:00'],
+        5: ['09:30:00', '17:00:00'],
+        6: null
+    }
+});
+moment('2015-02-25T15:00:00Z').isWorkingTime(); // false
+moment('2015-02-23T09:00:00Z').isWorkingTime(); // false
+moment.updateLocale('en', {
+    holidays: [
+        '2015-05-04'
+    ]
+});
+moment('2015-05-04T09:30:00Z').isWorkingDay(); // false
+moment.updateLocale('en', {
+    holidays: [
+        '*-12-25'
+    ]
+});
+moment('2015-12-25T16:30:00Z').isWorkingDay(); // false
+moment('2016-12-25T16:30:00Z').isWorkingDay(); // false
+moment('2017-12-25T16:30:00Z').isWorkingDay(); // false
+moment('2018-12-25T16:30:00Z').isWorkingDay(); // false
diff --git a/types/moment-business-time/tsconfig.json b/types/moment-business-time/tsconfig.json
new file mode 100644
index 0000000000..c1212caa2f
--- /dev/null
+++ b/types/moment-business-time/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",
+        "moment-business-time-tests.ts"
+    ]
+}
diff --git a/types/moment-business-time/tslint.json b/types/moment-business-time/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/moment-business-time/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }