diff --git a/README.md b/README.md
index db871e1..48ecbca 100644
--- a/README.md
+++ b/README.md
@@ -38,4 +38,5 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 111. Minimum Depth of Binary Tree               | [Link](https://leetcode.com/problems/minimum-depth-of-binary-tree/)               | [Link](./lib/easy/111_minimum_depth_of_binary_tree.dart)               |
 | 112. Path Sum                                   | [Link](https://leetcode.com/problems/path-sum/)                                   | [Link](./lib/easy/112_path_sum.dart)                                   |
 | 118. Pascal's Triangle                          | [Link](https://leetcode.com/problems/pascals-triangle/)                           | [Link](./lib/easy/118_pascals_triangle.dart)                           |
+| 3280. Convert Date to Binary                    | [Link](https://leetcode.com/problems/convert-date-to-binary/)                     | [Link](./lib/easy/3280_convert_date_to_binary.dart)                    |
 | 3516. Find Closest Person                       | [Link](https://leetcode.com/problems/find-closest-person/)                        | [Link](./lib/easy/3516_find_closest_person.dart)                       |
diff --git a/lib/easy/3280_convert_date_to_binary.dart b/lib/easy/3280_convert_date_to_binary.dart
new file mode 100644
index 0000000..0e3d804
--- /dev/null
+++ b/lib/easy/3280_convert_date_to_binary.dart
@@ -0,0 +1,10 @@
+class Solution {
+  String convertDateToBinary(String date) {
+    return date
+        .split('-')
+        .map(
+          (part) => int.parse(part).toRadixString(2),
+        )
+        .join('-');
+  }
+}
diff --git a/pubspec.yaml b/pubspec.yaml
index 06838ea..aff6720 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: leetcode_dart
 description: Some solved problems from https://leetcode.com on Dart
-version: 1.0.2
+version: 1.0.3
 homepage: https://github.com/fartem/leetcode-dart
 
 environment:
diff --git a/test/easy/3280_convert_date_to_binary_test.dart b/test/easy/3280_convert_date_to_binary_test.dart
new file mode 100644
index 0000000..e309b9b
--- /dev/null
+++ b/test/easy/3280_convert_date_to_binary_test.dart
@@ -0,0 +1,30 @@
+import 'package:leetcode_dart/easy/3280_convert_date_to_binary.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group(
+    'Example tests',
+    () {
+      final solution = Solution();
+
+      test(
+        '100000100000-10-11101',
+        () => expect(
+          '100000100000-10-11101',
+          solution.convertDateToBinary(
+            '2080-02-29',
+          ),
+        ),
+      );
+      test(
+        '11101101100-1-1',
+        () => expect(
+          '11101101100-1-1',
+          solution.convertDateToBinary(
+            '1900-01-01',
+          ),
+        ),
+      );
+    },
+  );
+}