diff --git a/moment/moment-external-tests.ts b/moment/moment-external-tests.ts
index c5855c12c7..b76752b118 100644
--- a/moment/moment-external-tests.ts
+++ b/moment/moment-external-tests.ts
@@ -196,10 +196,17 @@ moment.isMoment();
 moment.isMoment(new Date());
 moment.isMoment(moment());
 
+moment.isDate(new Date());
+moment.isDate(/regexp/);
+
 moment.isDuration();
 moment.isDuration(new Date());
 moment.isDuration(moment.duration());
 
+moment().isBetween(moment(), moment());
+moment().isBetween(new Date(), new Date());
+moment().isBetween([1,1,2000], [1,1,2001], "year");
+
 moment.localeData('fr');
 moment(1316116057189).fromNow();
 
diff --git a/moment/moment-node.d.ts b/moment/moment-node.d.ts
index ba5fe85d16..fd0d59d682 100644
--- a/moment/moment-node.d.ts
+++ b/moment/moment-node.d.ts
@@ -69,6 +69,7 @@ declare module moment {
         subtract(d: Duration): Duration;
 
         toISOString(): string;
+        toJSON(): string;
 
     }
 
@@ -215,11 +216,8 @@ declare module moment {
         dayOfYear(): number;
         dayOfYear(d: number): Moment;
 
-        from(f: Moment): string;
-        from(f: Moment, suffix: boolean): string;
-        from(d: Date): string;
-        from(s: string): string;
-        from(date: number[]): string;
+        from(f: Moment|string|number|Date|number[], suffix?: boolean): string;
+        to(f: Moment|string|number|Date|number[], suffix?: boolean): string;
 
         diff(b: Moment): number;
         diff(b: Moment, unitOfTime: string): number;
@@ -242,39 +240,13 @@ declare module moment {
         isDST(): boolean;
 
         isBefore(): boolean;
-        isBefore(b: Moment): boolean;
-        isBefore(b: string): boolean;
-        isBefore(b: Number): boolean;
-        isBefore(b: Date): boolean;
-        isBefore(b: number[]): boolean;
-        isBefore(b: Moment, granularity: string): boolean;
-        isBefore(b: String, granularity: string): boolean;
-        isBefore(b: Number, granularity: string): boolean;
-        isBefore(b: Date, granularity: string): boolean;
-        isBefore(b: number[], granularity: string): boolean;
+        isBefore(b: Moment|string|number|Date|number[], granularity?: string): boolean;
 
         isAfter(): boolean;
-        isAfter(b: Moment): boolean;
-        isAfter(b: string): boolean;
-        isAfter(b: Number): boolean;
-        isAfter(b: Date): boolean;
-        isAfter(b: number[]): boolean;
-        isAfter(b: Moment, granularity: string): boolean;
-        isAfter(b: String, granularity: string): boolean;
-        isAfter(b: Number, granularity: string): boolean;
-        isAfter(b: Date, granularity: string): boolean;
-        isAfter(b: number[], granularity: string): boolean;
+        isAfter(b: Moment|string|number|Date|number[], granularity?: string): boolean;
 
-        isSame(b: Moment): boolean;
-        isSame(b: string): boolean;
-        isSame(b: Number): boolean;
-        isSame(b: Date): boolean;
-        isSame(b: number[]): boolean;
-        isSame(b: Moment, granularity: string): boolean;
-        isSame(b: String, granularity: string): boolean;
-        isSame(b: Number, granularity: string): boolean;
-        isSame(b: Date, granularity: string): boolean;
-        isSame(b: number[], granularity: string): boolean;
+        isSame(b: Moment|string|number|Date|number[], granularity?: string): boolean;
+        isBetween(a: Moment|string|number|Date|number[], b: Moment|string|number|Date|number[], granularity?: string): boolean;
 
         // Deprecated as of 2.8.0.
         lang(language: string): Moment;
@@ -290,20 +262,12 @@ declare module moment {
         localeData(): MomentLanguage;
 
         // Deprecated as of 2.7.0.
-        max(date: Date): Moment;
-        max(date: number): Moment;
-        max(date: any[]): Moment;
-        max(date: string): Moment;
+        max(date: Moment|string|number|Date|any[]): Moment;
         max(date: string, format: string): Moment;
-        max(clone: Moment): Moment;
 
         // Deprecated as of 2.7.0.
-        min(date: Date): Moment;
-        min(date: number): Moment;
-        min(date: any[]): Moment;
-        min(date: string): Moment;
+        min(date: Moment|string|number|Date|any[]): Moment;
         min(date: string, format: string): Moment;
-        min(clone: Moment): Moment;
 
         get(unit: string): number;
         set(unit: string, value: number): Moment;
@@ -412,6 +376,7 @@ declare module moment {
         invalid(parsingFlags?: Object): Moment;
         isMoment(): boolean;
         isMoment(m: any): boolean;
+        isDate(m: any): boolean;
         isDuration(): boolean;
         isDuration(d: any): boolean;
 
diff --git a/moment/moment-tests.ts b/moment/moment-tests.ts
index 16490d2e19..04c0753529 100644
--- a/moment/moment-tests.ts
+++ b/moment/moment-tests.ts
@@ -196,10 +196,17 @@ moment.isMoment();
 moment.isMoment(new Date());
 moment.isMoment(moment());
 
+moment.isDate(new Date());
+moment.isDate(/regexp/);
+
 moment.isDuration();
 moment.isDuration(new Date());
 moment.isDuration(moment.duration());
 
+moment().isBetween(moment(), moment());
+moment().isBetween(new Date(), new Date());
+moment().isBetween([1,1,2000], [1,1,2001], "year");
+
 moment.localeData('fr');
 moment(1316116057189).fromNow();
 
@@ -228,6 +235,8 @@ moment.duration(500).seconds();
 moment.duration(500).asSeconds();
 moment.duration().minutes();
 moment.duration().asMinutes();
+moment.duration().toISOString();
+moment.duration().toJSON();
 
 var adur = moment.duration(3, 'd');
 var bdur = moment.duration(2, 'd');