diff --git a/src/plugins/lib/holidays.xml b/src/plugins/lib/holidays.xml
index be2bc63cf..da15cd4f6 100644
--- a/src/plugins/lib/holidays.xml
+++ b/src/plugins/lib/holidays.xml
@@ -365,21 +365,11 @@
     <date name="Victoire 1945" value="*/5/8" type="National" />
     <date name="Fête Nationale" value="*/7/14" type="National" />
     <date name="Armistice 1918" value="*/11/11" type="National" />
-    <date name="Pâques" value="2007/4/8" type="religious" />
-    <date name="Pâques" value="2008/3/23" type="religious" />
-    <date name="Pâques" value="2009/4/12" type="religious" />
-    <date name="Lundi de pâques" value="2007/4/9" type="religious" />
-    <date name="Lundi de pâques" value="2008/3/24" type="religious" />
-    <date name="Lundi de pâques" value="2009/4/13" type="religious" />
-    <date name="Ascension" value="2007/5/17" type="religious" />
-    <date name="Ascension" value="2008/5/1" type="religious" />
-    <date name="Ascension" value="2009/5/21" type="religious" />
-    <date name="Pentecôte" value="2007/5/27" type="religious" />
-    <date name="Pentecôte" value="2008/5/11" type="religious" />
-    <date name="Pentecôte" value="2009/5/31" type="religious" />
-    <date name="Lundi de pentecôte" value="2007/5/28" type="religious" />
-    <date name="Lundi de pentecôte" value="2008/5/12" type="religious" />
-    <date name="Lundi de pentecôte" value="2009/6/01" type="religious" />
+    <date name="Pâques" type="religious" value="> easter(y)"  />
+    <date name="Lundi de pâques" type="religious" value="> easter(y)" offset="1" />
+    <date name="Ascension" type="religious" value="> easter(y)" offset="39" />
+    <date name="Pentecôte" type="religious" value="> easter(y)" offset="49" />
+    <date name="Lundi de pentecôte" type="religious" value="> easter(y)" offset="50" />
     <date name="Assomption" value="*/8/15" type="religious" />
     <date name="Toussaint" value="*/11/1" type="religious" />
     <date name="Noël" value="*/12/25" type="religious" />