diff --git a/journal/logbook.md b/journal/logbook.md
index 4295ff332bc46ccf0c80246437f5031a4bc469d0..999ba303b715af908350c8389659ac3f94e78021 100644
--- a/journal/logbook.md
+++ b/journal/logbook.md
@@ -109,3 +109,13 @@ In this task, the following steps were perfomed:
 
 **A comparative analysis with the reference solution confirmed the implementation was correct.**
 
+## Exercise 03 (2nd part)
+
+The objective of this tast is to analyze the incidence of chickenpox using a new dataset. It is necessary to identify the strongest and weakest epidemic years using the incidence data.
+
+For this aim, I perfomed the following step:
+
+- Loaded the dataset from the Website Sentinelles 
+- Converted weekly data to dates and grouped it by epidemiological year (from September 1 to August 31)
+- Calculated the total incidence per epidemiological year
+