diff --git a/concepts/datetime/about.md b/concepts/datetime/about.md
index 2724d5cdb..468ae079b 100644
--- a/concepts/datetime/about.md
+++ b/concepts/datetime/about.md
@@ -47,7 +47,7 @@ These methods return a _new_ `LocalDate` instance and do not update the existing
 ```java
 LocalDate date = LocalDate.of(2007, 12, 3);
 
-date.addDays(3);
+date.plusDays(3);
 // => 2007-12-06
 
 date.addMonths(1);
diff --git a/concepts/datetime/introduction.md b/concepts/datetime/introduction.md
index afb15b114..2b9513189 100644
--- a/concepts/datetime/introduction.md
+++ b/concepts/datetime/introduction.md
@@ -41,7 +41,7 @@ These methods return a _new_ `LocalDate` instance and do not update the existing
 ```java
 LocalDate date = LocalDate.of(2007, 12, 3);
 
-date.addDays(3);
+date.plusDays(3);
 // => 2007-12-06
 ```
 
diff --git a/exercises/concept/booking-up-for-beauty/.docs/introduction.md b/exercises/concept/booking-up-for-beauty/.docs/introduction.md
index 2baa59e0f..ed132331c 100644
--- a/exercises/concept/booking-up-for-beauty/.docs/introduction.md
+++ b/exercises/concept/booking-up-for-beauty/.docs/introduction.md
@@ -43,7 +43,7 @@ These methods return a _new_ `LocalDate` instance and do not update the existing
 ```java
 LocalDate date = LocalDate.of(2007, 12, 3);
 
-date.addDays(3);
+date.plusDays(3);
 // => 2007-12-06
 ```