diff --git a/cjs/serialize.js b/cjs/serialize.js
index 59b2d38..ac6cec1 100644
--- a/cjs/serialize.js
+++ b/cjs/serialize.js
@@ -119,7 +119,7 @@ const serializer = (strict, json, $, _) => {
         return index;
       }
       case DATE:
-        return as([TYPE, value.toISOString()], value);
+        return as([TYPE, isNaN(value.getTime()) ? EMPTY : value.toISOString()], value);
       case REGEXP: {
         const {source, flags} = value;
         return as([TYPE, {source, flags}], value);
diff --git a/esm/serialize.js b/esm/serialize.js
index 6286047..24cfe2c 100644
--- a/esm/serialize.js
+++ b/esm/serialize.js
@@ -121,7 +121,7 @@ const serializer = (strict, json, $, _) => {
         return index;
       }
       case DATE:
-        return as([TYPE, value.toISOString()], value);
+        return as([TYPE, isNaN(value.getTime()) ? EMPTY : value.toISOString()], value);
       case REGEXP: {
         const {source, flags} = value;
         return as([TYPE, {source, flags}], value);
diff --git a/test/index.js b/test/index.js
index b5e542d..0277401 100644
--- a/test/index.js
+++ b/test/index.js
@@ -159,4 +159,13 @@ assert(lossy2[3].size, 0);
 assert(JSON.stringify(lossy2[4]), '{}');
 assert(lossy2[5], 'OK');
 
+// an Invalid Date must round-trip like native structuredClone instead of throwing
+const invalidDate = new Date(NaN);
+const invalidViaRecord = deserialize(serialize(invalidDate));
+assert(invalidViaRecord instanceof Date, true);
+assert(Number.isNaN(invalidViaRecord.getTime()), true);
+const invalidViaJSON = parse(stringify(invalidDate));
+assert(invalidViaJSON instanceof Date, true);
+assert(Number.isNaN(invalidViaJSON.getTime()), true);
+
 require('./eval.js');