diff --git a/src/deque.h b/src/deque.h
index f9fe592..d729d4d 100644
--- a/src/deque.h
+++ b/src/deque.h
@@ -1,7 +1,7 @@
 /**
  * deque.h
  *
- * Last Update: 22/03/2019
+ * Creation Date: 20/03/2019
  *
  * Authors:
  * Leonardo Vencovsky (https://github.com/LeoVen)
diff --git a/src/foreach.h b/src/foreach.h
index d3bcc17..f7af4f1 100644
--- a/src/foreach.h
+++ b/src/foreach.h
@@ -1,7 +1,7 @@
 /**
  * @file for_each.h
  *
- * Last Update: 22/03/2019
+ * Creation Date: 25/02/2019
  *
  * Authors:
  * Leonardo Vencovsky (https://github.com/LeoVen)
diff --git a/src/linkedlist.h b/src/linkedlist.h
index 763db5d..7621344 100644
--- a/src/linkedlist.h
+++ b/src/linkedlist.h
@@ -1,7 +1,7 @@
 /**
  * linkedlist.h
  *
- * Last Update: 22/03/2019
+ * Creation Date: 22/03/2019
  *
  * Authors:
  * Leonardo Vencovsky (https://github.com/LeoVen)
diff --git a/src/list.h b/src/list.h
index 8599736..540f9fe 100644
--- a/src/list.h
+++ b/src/list.h
@@ -1,7 +1,7 @@
 /**
  * list.h
  *
- * Last Update: 22/03/2019
+ * Creation Date: 12/02/2019
  *
  * Authors:
  * Leonardo Vencovsky (https://github.com/LeoVen)
diff --git a/src/macro_collections.h b/src/macro_collections.h
index 9eacd7d..774b236 100644
--- a/src/macro_collections.h
+++ b/src/macro_collections.h
@@ -1,7 +1,7 @@
 /**
  * macro_collections.h
  *
- * Last Update: 22/03/2019
+ * Creation Date: 11/02/2019
  *
  * Authors:
  * Leonardo Vencovsky (https://github.com/LeoVen)
diff --git a/src/queue.h b/src/queue.h
index f72323a..d53def6 100644
--- a/src/queue.h
+++ b/src/queue.h
@@ -1,7 +1,7 @@
 /**
  * queue.h
  *
- * Last Update: 22/03/2019
+ * Creation Date: 15/02/2019
  *
  * Authors:
  * Leonardo Vencovsky (https://github.com/LeoVen)
diff --git a/src/stack.h b/src/stack.h
index b4be4cf..fb1e057 100644
--- a/src/stack.h
+++ b/src/stack.h
@@ -1,7 +1,7 @@
 /**
  * stack.h
  *
- * Last Update: 22/03/2019
+ * Creation Date: 14/02/2019
  *
  * Authors:
  * Leonardo Vencovsky (https://github.com/LeoVen)