diff --git a/src/date.rs b/src/date.rs
index c4ee103..696e19f 100644
--- a/src/date.rs
+++ b/src/date.rs
@@ -1,5 +1,5 @@
 // This is a part of rust-chrono.
-// Copyright (c) 2014, Kang Seonghoon.
+// Copyright (c) 2014-2015, Kang Seonghoon.
 // See README.md and LICENSE.txt for details.
 
 /*!
diff --git a/src/datetime.rs b/src/datetime.rs
index b51a4d8..47f4171 100644
--- a/src/datetime.rs
+++ b/src/datetime.rs
@@ -1,5 +1,5 @@
 // This is a part of rust-chrono.
-// Copyright (c) 2014, Kang Seonghoon.
+// Copyright (c) 2014-2015, Kang Seonghoon.
 // See README.md and LICENSE.txt for details.
 
 /*!
diff --git a/src/format.rs b/src/format.rs
index 5731110..8e5c757 100644
--- a/src/format.rs
+++ b/src/format.rs
@@ -1,5 +1,5 @@
 // This is a part of rust-chrono.
-// Copyright (c) 2014, Kang Seonghoon.
+// Copyright (c) 2014-2015, Kang Seonghoon.
 // See README.md and LICENSE.txt for details.
 
 /*!
diff --git a/src/lib.rs b/src/lib.rs
index 5387ecf..07de750 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,5 +1,5 @@
 // This is a part of rust-chrono.
-// Copyright (c) 2014, Kang Seonghoon.
+// Copyright (c) 2014-2015, Kang Seonghoon.
 // See README.md and LICENSE.txt for details.
 
 /*!
diff --git a/src/naive/date.rs b/src/naive/date.rs
index 06f9cf7..b6c3c41 100644
--- a/src/naive/date.rs
+++ b/src/naive/date.rs
@@ -1,5 +1,5 @@
 // This is a part of rust-chrono.
-// Copyright (c) 2014, Kang Seonghoon.
+// Copyright (c) 2014-2015, Kang Seonghoon.
 // See README.md and LICENSE.txt for details.
 
 /*!
diff --git a/src/naive/datetime.rs b/src/naive/datetime.rs
index 9a49212..074e4a2 100644
--- a/src/naive/datetime.rs
+++ b/src/naive/datetime.rs
@@ -1,5 +1,5 @@
 // This is a part of rust-chrono.
-// Copyright (c) 2014, Kang Seonghoon.
+// Copyright (c) 2014-2015, Kang Seonghoon.
 // See README.md and LICENSE.txt for details.
 
 /*!
diff --git a/src/naive/time.rs b/src/naive/time.rs
index 2779e5b..9a42068 100644
--- a/src/naive/time.rs
+++ b/src/naive/time.rs
@@ -1,5 +1,5 @@
 // This is a part of rust-chrono.
-// Copyright (c) 2014, Kang Seonghoon.
+// Copyright (c) 2014-2015, Kang Seonghoon.
 // See README.md and LICENSE.txt for details.
 
 /*!
diff --git a/src/offset.rs b/src/offset.rs
index 3046928..c0719ee 100644
--- a/src/offset.rs
+++ b/src/offset.rs
@@ -1,5 +1,5 @@
 // This is a part of rust-chrono.
-// Copyright (c) 2014, Kang Seonghoon.
+// Copyright (c) 2014-2015, Kang Seonghoon.
 // See README.md and LICENSE.txt for details.
 
 /*!
diff --git a/src/time.rs b/src/time.rs
index 741b90a..9b0294c 100644
--- a/src/time.rs
+++ b/src/time.rs
@@ -1,5 +1,5 @@
 // This is a part of rust-chrono.
-// Copyright (c) 2014, Kang Seonghoon.
+// Copyright (c) 2014-2015, Kang Seonghoon.
 // See README.md and LICENSE.txt for details.
 
 /*!