diff --git a/tp-date-input.js b/tp-date-input.js
index 3b5e3e5..3547a47 100644
--- a/tp-date-input.js
+++ b/tp-date-input.js
@@ -291,7 +291,17 @@ class TpDateInput extends EventHelpers(ControlState(FormElement(LitElement))) {
       return;
     }
 
-    const date = parse(i0 + '-' + i1 + '-' + i2, this._inputAssign.join('-'), new Date());
+    // Convert luxon format to match input assignment
+    const luxonFormat = this._inputAssign.map(part => {
+      switch (part) {
+        case 'MM': return 'LL';
+        case 'dd': return 'dd';
+        case 'y': return 'yyyy';
+        default: return part;
+      }
+    }).join('-');
+
+    const dt = DateTime.fromFormat(i0 + '-' + i1 + '-' + i2, luxonFormat);
 
     if (dt.isValid) {
       this.inputs[0].invalid = false;
@@ -512,4 +522,4 @@ class TpDateInput extends EventHelpers(ControlState(FormElement(LitElement))) {
   }
 }
 
-window.customElements.define('tp-date-input', TpDateInput);
+window.customElements.define('tp-date-input', TpDateInput);
\ No newline at end of file