diff --git a/src/fr/devinsy/statoolinfos/core/Federation.java b/src/fr/devinsy/statoolinfos/core/Federation.java
index 13293d9..4c50b09 100644
--- a/src/fr/devinsy/statoolinfos/core/Federation.java
+++ b/src/fr/devinsy/statoolinfos/core/Federation.java
@@ -21,6 +21,7 @@ package fr.devinsy.statoolinfos.core;
 import java.io.File;
 import java.net.MalformedURLException;
 import java.net.URL;
+import java.time.LocalDate;
 import java.time.LocalDateTime;
 
 import org.apache.commons.lang3.StringUtils;
@@ -578,7 +579,22 @@ public class Federation extends PathPropertyList
      *
      * @return the start date
      */
-    public String getStartDate()
+    public LocalDate getStartDate()
+    {
+        LocalDate result;
+
+        result = StatoolInfosUtils.parseDate(getStartDateValue());
+
+        //
+        return result;
+    }
+
+    /**
+     * Gets the start date.
+     *
+     * @return the start date
+     */
+    public String getStartDateValue()
     {
         String result;
 
diff --git a/src/fr/devinsy/statoolinfos/htmlize/ChartHtmlizer.java b/src/fr/devinsy/statoolinfos/htmlize/ChartHtmlizer.java
index f4ab5c6..4b3419f 100644
--- a/src/fr/devinsy/statoolinfos/htmlize/ChartHtmlizer.java
+++ b/src/fr/devinsy/statoolinfos/htmlize/ChartHtmlizer.java
@@ -1267,8 +1267,7 @@ public class ChartHtmlizer
     {
         String result;
 
-        result = htmlizeServiceCountMonthChart(federation.getServicesAll(),
-                YearMonth.from(StatoolInfosUtils.parseDate(federation.getStartDate())));
+        result = htmlizeServiceCountMonthChart(federation.getServicesAll(), YearMonth.from(federation.getStartDate()));
 
         //
         return result;
@@ -1287,7 +1286,7 @@ public class ChartHtmlizer
     {
         String result;
 
-        LocalDate startDate = StatoolInfosUtils.parseDate(organization.getFederation().getStartDate());
+        LocalDate startDate = organization.getFederation().getStartDate();
 
         if (startDate == null)
         {
@@ -1453,7 +1452,7 @@ public class ChartHtmlizer
     {
         String result;
 
-        result = htmlizeServiceCountYearChart(federation.getServices(), StatoolInfosUtils.parseDate(federation.getStartDate()).getYear());
+        result = htmlizeServiceCountYearChart(federation.getServices(), federation.getStartDate().getYear());
 
         //
         return result;
@@ -1472,7 +1471,7 @@ public class ChartHtmlizer
     {
         String result;
 
-        LocalDate startDate = StatoolInfosUtils.parseDate(organization.getFederation().getStartDate());
+        LocalDate startDate = organization.getFederation().getStartDate();
 
         if (startDate == null)
         {
diff --git a/src/fr/devinsy/statoolinfos/htmlize/FederationHeaderView.java b/src/fr/devinsy/statoolinfos/htmlize/FederationHeaderView.java
index cd15008..85c9238 100644
--- a/src/fr/devinsy/statoolinfos/htmlize/FederationHeaderView.java
+++ b/src/fr/devinsy/statoolinfos/htmlize/FederationHeaderView.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2021 Christian Pierre MOMON <christian@momon.org>
+ * Copyright (C) 2020-2022 Christian Pierre MOMON <christian@momon.org>
  * 
  * This file is part of StatoolInfos, simple service statistics tool.
  * 
@@ -69,7 +69,7 @@ public class FederationHeaderView
                 data.setEscapedContent("federationURL", federation.getWebsiteURL().toString());
                 data.setEscapedAttribute("federationURL", "href", federation.getWebsiteURL().toString());
             }
-            data.setContent("federationStartDate", StringUtils.defaultIfBlank(federation.getStartDate(), "n/a"));
+            data.setContent("federationStartDate", StringUtils.defaultIfBlank(federation.getStartDateValue(), "n/a"));
 
             data.setAttribute("organizationsLink", "href", federation.getTechnicalName() + "-organizations.xhtml");
             data.setAttribute("servicesLink", "href", federation.getTechnicalName() + "-services.xhtml");