diff --git a/.changeset/new-cobras-sort.md b/.changeset/new-cobras-sort.md
new file mode 100644
index 000000000..49bb32df9
--- /dev/null
+++ b/.changeset/new-cobras-sort.md
@@ -0,0 +1,5 @@
+---
+'@lion/ui': patch
+---
+
+[localize] Fix bug that accepted 3 digit year
diff --git a/packages/ui/components/localize/src/date/parseDate.js b/packages/ui/components/localize/src/date/parseDate.js
index 671c19309..8a3fccf50 100644
--- a/packages/ui/components/localize/src/date/parseDate.js
+++ b/packages/ui/components/localize/src/date/parseDate.js
@@ -1,6 +1,7 @@
 import { getDateFormatBasedOnLocale } from './getDateFormatBasedOnLocale.js';
 import { getLocalizeManager } from '../getLocalizeManager.js';
 import { addLeadingZero } from './utils/addLeadingZero.js';
+import { isCorrectYearFormat } from './utils/checkYearFormat.js';
 
 /**
  * @typedef {import('../../types/LocalizeMixinTypes.js').FormatDateOptions} FormatDateOptions
@@ -63,12 +64,16 @@ export function parseDate(dateString, options) {
   }
 
   const [year, month, day] = parsedString.split('/').map(Number);
+  const [yearString] = parsedString.split('/');
+  if (!isCorrectYearFormat(yearString)) {
+    return undefined;
+  }
   let correctedYear = year;
   if (year < 50) {
     correctedYear = 2000 + year;
   }
 
-  const parsedDate = new Date(new Date(correctedYear, month - 1, day));
+  const parsedDate = new Date(correctedYear, month - 1, day);
   // Check if parsedDate is not `Invalid Date` or that the date has changed (e.g. the not existing 31.02.2020)
   if (
     year > 0 &&
diff --git a/packages/ui/components/localize/src/date/utils/checkYearFormat.js b/packages/ui/components/localize/src/date/utils/checkYearFormat.js
new file mode 100644
index 000000000..c1aa14027
--- /dev/null
+++ b/packages/ui/components/localize/src/date/utils/checkYearFormat.js
@@ -0,0 +1,8 @@
+/**
+ *
+ * @param {string} year
+ * @returns {boolean}
+ */
+export function isCorrectYearFormat(year) {
+  return /^\d{2}(\d{2})?$/g.test(year);
+}
diff --git a/packages/ui/components/localize/test/date/parseDate.test.js b/packages/ui/components/localize/test/date/parseDate.test.js
index a42f62179..0516f1ebd 100644
--- a/packages/ui/components/localize/test/date/parseDate.test.js
+++ b/packages/ui/components/localize/test/date/parseDate.test.js
@@ -91,4 +91,10 @@ describe('parseDate()', () => {
     expect(parseDate('02.31.2020')).to.equal(undefined); // non existing date
     expect(parseDate('31.12.2020')).to.equal(undefined); // day & month switched places
   });
+
+  it('returns undefined for incorrect year format', () => {
+    // TODO: we need a `> 0` check for day and month, but maybe consider `>= 0` for year?
+    expect(parseDate('12-12-0000')).to.equal(undefined);
+    expect(parseDate('12-12-999')).to.equal(undefined);
+  });
 });