diff --git a/packages/input-date/src/LionInputDate.js b/packages/input-date/src/LionInputDate.js
index 78f73f639..dcaab505d 100644
--- a/packages/input-date/src/LionInputDate.js
+++ b/packages/input-date/src/LionInputDate.js
@@ -1,5 +1,5 @@
-import { LocalizeMixin, formatDate, parseDate } from '@lion/localize';
 import { LionInput } from '@lion/input';
+import { formatDate, LocalizeMixin, parseDate } from '@lion/localize';
 import { IsDate } from '@lion/validate';
 
 /**
@@ -41,7 +41,10 @@ export class LionInputDate extends LocalizeMixin(LionInput) {
     if (!(modelValue instanceof Date)) {
       return '';
     }
-    return modelValue.toISOString().slice(0, 10);
+    // modelValue is localized, so we take the timezone offset in milliseconds and subtract it
+    // before converting it to ISO string
+    const offset = modelValue.getTimezoneOffset() * 60000;
+    return new Date(modelValue - offset).toISOString().slice(0, 10);
   }
 
   // eslint-disable-next-line class-methods-use-this
diff --git a/packages/input-date/test/lion-input-date.test.js b/packages/input-date/test/lion-input-date.test.js
index c31f897ff..be98dcc40 100644
--- a/packages/input-date/test/lion-input-date.test.js
+++ b/packages/input-date/test/lion-input-date.test.js
@@ -141,9 +141,9 @@ describe('<lion-input-date>', () => {
   it('serializes to iso format', async () => {
     const el = await fixture(
       html`
-        <lion-input-date .modelValue="${new Date('2000-12-12')}"></lion-input-date>
+        <lion-input-date .modelValue="${new Date('2000/12/15')}"></lion-input-date>
       `,
     );
-    expect(el.serializedValue).to.equal('2000-12-12');
+    expect(el.serializedValue).to.equal('2000-12-15');
   });
 });