diff --git a/CHANGELOG.md b/CHANGELOG.md
index ff45070..16e65c3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,13 +2,13 @@
 
 * Your contribution here.
 
-### 1.2.0 (2026/8/14)
+### 1.2.0 (2026/08/14)
 
 * [#49](https://github.com/dblock/ruby-enum/issues/49): Fixed `NoMethodError` on `keys`, `values`, `key?`, `value?`, `key`, `value`, `to_h`, `parse` and `each` when a subclass defines no enums of its own - [@dblock](https://github.com/dblock).
 * [#49](https://github.com/dblock/ruby-enum/issues/49): `keys`, `key?`, `value?`, `key`, `value`, `to_h`, `parse` and `each` now include enums defined in a superclass, matching the existing behavior of `values` - [@dblock](https://github.com/dblock).
 * [#61](https://github.com/dblock/ruby-enum/pull/61): Document performance overhead in README, add `rake benchmark:basic` - [@dblock](https://github.com/dblock).
 
-### 1.1.0 (2026/6/20)
+### 1.1.0 (2026/06/20)
 
 * [#56](https://github.com/dblock/ruby-enum/pull/56): Fix `DuplicateKeyError` when the enum class is reloaded - [@flvrone](https://github.com/flvrone).
 * [#54](https://github.com/dblock/ruby-enum/pull/54): Add support for Ruby 4.0 - [@dblock](https://github.com/dblock).
diff --git a/LICENSE.md b/LICENSE.md
index a450dc3..549897c 100644
--- a/LICENSE.md
+++ b/LICENSE.md
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2013-2021 Daniel Doubrovkine.
+Copyright (c) 2013-2026 Daniel Doubrovkine.
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the
diff --git a/README.md b/README.md
index dcd0a08..882d603 100644
--- a/README.md
+++ b/README.md
@@ -357,7 +357,7 @@ You're encouraged to contribute to ruby-enum. See [CONTRIBUTING](CONTRIBUTING.md
 
 ## Copyright and License
 
-Copyright (c) 2013-2021, Daniel Doubrovkine and [Contributors](CHANGELOG.md).
+Copyright (c) 2013-2026, Daniel Doubrovkine and [Contributors](CHANGELOG.md).
 
 This project is licensed under the [MIT License](LICENSE.md).