diff --git a/finalynx/simulator/recurrence.py b/finalynx/simulator/recurrence.py
index a0d372c..de72080 100644
--- a/finalynx/simulator/recurrence.py
+++ b/finalynx/simulator/recurrence.py
@@ -36,7 +36,7 @@ def __init__(
         months = months if months is not None else 0
         years = years if years is not None else 0
 
-        self._delta = timedelta(days, weeks=4 * months + 52 * years)
+        self._delta = timedelta(days, weeks=4.3452 * months + 52.1429 * years+0.1429) #Ajout de 0.1429 pour rester au même jour sinon Yearly le 30 au lieu du 31/12
 
     def _next_date(self, current_date: date) -> date:
         return current_date + self._delta