diff --git a/superset-frontend/temporary_superset_ui/superset-ui/packages/superset-ui-core/test/models/ExtensibleFunction.test.ts b/superset-frontend/temporary_superset_ui/superset-ui/packages/superset-ui-core/test/models/ExtensibleFunction.test.ts
index c7e43d112259..c2c28fdda1a1 100644
--- a/superset-frontend/temporary_superset_ui/superset-ui/packages/superset-ui-core/test/models/ExtensibleFunction.test.ts
+++ b/superset-frontend/temporary_superset_ui/superset-ui/packages/superset-ui-core/test/models/ExtensibleFunction.test.ts
@@ -1,11 +1,20 @@
 import { ExtensibleFunction } from '../../src';
 
 describe('ExtensibleFunction', () => {
+  interface Func1 {
+    (): number;
+  }
+
   class Func1 extends ExtensibleFunction {
     constructor(x: unknown) {
       super(() => x); // closure
     }
   }
+
+  interface Func2 {
+    (): number;
+  }
+
   class Func2 extends ExtensibleFunction {
     x: unknown;
 
diff --git a/superset-frontend/temporary_superset_ui/superset-ui/packages/superset-ui-number-format/src/NumberFormatter.ts b/superset-frontend/temporary_superset_ui/superset-ui/packages/superset-ui-number-format/src/NumberFormatter.ts
index 4dd6854e153e..2ceb5401cea5 100644
--- a/superset-frontend/temporary_superset_ui/superset-ui/packages/superset-ui-number-format/src/NumberFormatter.ts
+++ b/superset-frontend/temporary_superset_ui/superset-ui/packages/superset-ui-number-format/src/NumberFormatter.ts
@@ -11,7 +11,13 @@ export interface NumberFormatterConfig {
   isInvalid?: boolean;
 }
 
-export default class NumberFormatter extends ExtensibleFunction {
+// Use type augmentation to indicate that
+// an instance of NumberFormatter is also a function
+interface NumberFormatter {
+  (value: number | null | undefined): string;
+}
+
+class NumberFormatter extends ExtensibleFunction {
   id: string;
 
   label: string;
@@ -57,3 +63,5 @@ export default class NumberFormatter extends ExtensibleFunction {
     return `${value} => ${this.format(value)}`;
   }
 }
+
+export default NumberFormatter;
diff --git a/superset-frontend/temporary_superset_ui/superset-ui/packages/superset-ui-time-format/src/TimeFormatter.ts b/superset-frontend/temporary_superset_ui/superset-ui/packages/superset-ui-time-format/src/TimeFormatter.ts
index 84fa191469c2..0896ea05ad40 100644
--- a/superset-frontend/temporary_superset_ui/superset-ui/packages/superset-ui-time-format/src/TimeFormatter.ts
+++ b/superset-frontend/temporary_superset_ui/superset-ui/packages/superset-ui-time-format/src/TimeFormatter.ts
@@ -3,7 +3,13 @@ import { TimeFormatFunction } from './types';
 
 export const PREVIEW_TIME = new Date(Date.UTC(2017, 1, 14, 11, 22, 33));
 
-export default class TimeFormatter extends ExtensibleFunction {
+// Use type augmentation to indicate that
+// an instance of TimeFormatter is also a function
+interface TimeFormatter {
+  (value: Date | number | null | undefined): string;
+}
+
+class TimeFormatter extends ExtensibleFunction {
   id: string;
 
   label: string;
@@ -21,7 +27,7 @@ export default class TimeFormatter extends ExtensibleFunction {
     formatFunc: TimeFormatFunction;
     useLocalTime?: boolean;
   }) {
-    super((value: Date | null | undefined) => this.format(value));
+    super((value: Date | number | null | undefined) => this.format(value));
 
     const {
       id = isRequired('config.id'),
@@ -38,15 +44,17 @@ export default class TimeFormatter extends ExtensibleFunction {
     this.useLocalTime = useLocalTime;
   }
 
-  format(value: Date | null | undefined) {
+  format(value: Date | number | null | undefined) {
     if (value === null || value === undefined) {
       return `${value}`;
     }
 
-    return this.formatFunc(value);
+    return this.formatFunc(value instanceof Date ? value : new Date(value));
   }
 
   preview(value: Date = PREVIEW_TIME) {
     return `${value.toUTCString()} => ${this.format(value)}`;
   }
 }
+
+export default TimeFormatter;
diff --git a/superset-frontend/temporary_superset_ui/superset-ui/packages/superset-ui-time-format/test/TimeFormatter.test.ts b/superset-frontend/temporary_superset_ui/superset-ui/packages/superset-ui-time-format/test/TimeFormatter.test.ts
index 31a6826c5365..282578b6a9f2 100644
--- a/superset-frontend/temporary_superset_ui/superset-ui/packages/superset-ui-time-format/test/TimeFormatter.test.ts
+++ b/superset-frontend/temporary_superset_ui/superset-ui/packages/superset-ui-time-format/test/TimeFormatter.test.ts
@@ -45,6 +45,9 @@ describe('TimeFormatter', () => {
     it('handles undefined', () => {
       expect(formatter.format(undefined)).toEqual('undefined');
     });
+    it('handles number, treating it as a timestamp', () => {
+      expect(formatter.format(PREVIEW_TIME.getTime())).toEqual('2017');
+    });
     it('otherwise returns formatted value', () => {
       expect(formatter.format(PREVIEW_TIME)).toEqual('2017');
     });