diff --git a/UNRELEASED.md b/UNRELEASED.md
index e22a6ef38fa..c7a9eb9d887 100644
--- a/UNRELEASED.md
+++ b/UNRELEASED.md
@@ -13,6 +13,7 @@ Use [the changelog guidelines](https://git.io/polaris-changelog-guidelines) to f
 ### Bug fixes
 
 - Fixed animation for Modal when being rendered asynchronously ([#2076](https://github.com/Shopify/polaris-react/pull/2076))
+- Updated `TextField` `min` and `max` type from `number` to `number | string` to allow min/max dates ([#1991](https://github.com/Shopify/polaris-react/pull/1991))
 
 ### Documentation
 
diff --git a/src/components/TextField/TextField.tsx b/src/components/TextField/TextField.tsx
index b83142c8e58..a300dddd06b 100644
--- a/src/components/TextField/TextField.tsx
+++ b/src/components/TextField/TextField.tsx
@@ -87,12 +87,12 @@ export interface BaseProps {
   step?: number;
   /** Enable automatic completion by the browser */
   autoComplete?: boolean | string;
-  /** Mimics the behavior of the native HTML attribute, limiting how high the spinner can increment the value */
-  max?: number;
+  /** Mimics the behavior of the native HTML attribute, limiting the maximum value */
+  max?: number | string;
   /** Maximum character length for an input */
   maxLength?: number;
-  /** Mimics the behavior of the native HTML attribute, limiting how low the spinner can decrement the value */
-  min?: number;
+  /** Mimics the behavior of the native HTML attribute, limiting the minimum value */
+  min?: number | string;
   /** Minimum character length for an input */
   minLength?: number;
   /** A regular expression to check the value against */
@@ -432,7 +432,10 @@ class TextField extends React.PureComponent<CombinedProps, State> {
     // step / value has.
     const decimalPlaces = Math.max(dpl(numericValue), dpl(step));
 
-    const newValue = Math.min(max, Math.max(numericValue + steps * step, min));
+    const newValue = Math.min(
+      Number(max),
+      Math.max(numericValue + steps * step, Number(min)),
+    );
     onChange(String(newValue.toFixed(decimalPlaces)), this.state.id);
   };