diff --git a/packages/noodl-runtime/src/nodes/std-library/datetostring.js b/packages/noodl-runtime/src/nodes/std-library/datetostring.js
index 93e0b3e..edf50ce 100644
--- a/packages/noodl-runtime/src/nodes/std-library/datetostring.js
+++ b/packages/noodl-runtime/src/nodes/std-library/datetostring.js
@@ -31,8 +31,6 @@ const DateToStringNode = {
 
         this._internal.currentInput = _value;
         this._format();
-        this.flagOutputDirty('currentValue');
-        this.sendSignalOnOutput('inputChanged');
       }
     }
   },
@@ -49,30 +47,45 @@ const DateToStringNode = {
       type: 'signal',
       displayName: 'Date Changed',
       group: 'Signals'
+    },
+    onError: {
+      type: 'signal',
+      displayName: 'Invalid Date',
+      group: 'Signals'
     }
   },
   methods: {
     _format() {
-      const t = this._internal.currentInput;
-      const format = this._internal.formatString;
-      const date = ('0' + t.getDate()).slice(-2);
-      const month = ('0' + (t.getMonth() + 1)).slice(-2);
-      const monthShort = new Intl.DateTimeFormat('en-US', { month: 'short' }).format(t);
-      const year = t.getFullYear();
-      const yearShort = year.toString().substring(2);
-      const hours = ('0' + t.getHours()).slice(-2);
-      const minutes = ('0' + t.getMinutes()).slice(-2);
-      const seconds = ('0' + t.getSeconds()).slice(-2);
+      try {
+        const t = this._internal.currentInput;
+        const format = this._internal.formatString;
+        const date = ('0' + t.getDate()).slice(-2);
+        const month = ('0' + (t.getMonth() + 1)).slice(-2);
+        const monthShort = new Intl.DateTimeFormat('en-US', { month: 'short' }).format(t);
+        const year = t.getFullYear();
+        const yearShort = year.toString().substring(2);
+        const hours = ('0' + t.getHours()).slice(-2);
+        const minutes = ('0' + t.getMinutes()).slice(-2);
+        const seconds = ('0' + t.getSeconds()).slice(-2);
 
-      this._internal.dateString = format
-        .replace(/\{date\}/g, date)
-        .replace(/\{month\}/g, month)
-        .replace(/\{monthShort\}/g, monthShort)
-        .replace(/\{year\}/g, year)
-        .replace(/\{yearShort\}/g, yearShort)
-        .replace(/\{hours\}/g, hours)
-        .replace(/\{minutes\}/g, minutes)
-        .replace(/\{seconds\}/g, seconds);
+        this._internal.dateString = format
+          .replace(/\{date\}/g, date)
+          .replace(/\{month\}/g, month)
+          .replace(/\{monthShort\}/g, monthShort)
+          .replace(/\{year\}/g, year)
+          .replace(/\{yearShort\}/g, yearShort)
+          .replace(/\{hours\}/g, hours)
+          .replace(/\{minutes\}/g, minutes)
+          .replace(/\{seconds\}/g, seconds);
+      } catch (error) {
+        // Set the output to be blank, makes it easier to handle.
+        this._internal.dateString = '';
+        this.flagOutputDirty('onError');
+      }
+
+      // Flag that the value have changed
+      this.flagOutputDirty('currentValue');
+      this.sendSignalOnOutput('inputChanged');
     }
   }
 };