diff --git a/copanier/reports.py b/copanier/reports.py
index aaea0ca..afb6daa 100644
--- a/copanier/reports.py
+++ b/copanier/reports.py
@@ -5,7 +5,7 @@ from openpyxl.writer.excel import save_virtual_workbook
 def summary(delivery):
     wb = Workbook()
     ws = wb.active
-    ws.title = f"{delivery.producer} {delivery.when.date()}"
+    ws.title = f"{delivery.producer} {delivery.from_date.date()}"
     ws.append(["ref", "produit", "prix", "unités", "total"])
     for product in delivery.products:
         wanted = delivery.product_wanted(product)
@@ -25,7 +25,7 @@ def summary(delivery):
 def full(delivery):
     wb = Workbook()
     ws = wb.active
-    ws.title = f"{delivery.producer} {delivery.when.date()}"
+    ws.title = f"{delivery.producer} {delivery.from_date.date()}"
     headers = ["ref", "produit", "prix"] + [e for e in delivery.orders] + ["total"]
     ws.append(headers)
     for product in delivery.products:
diff --git a/copanier/templates/signing_sheet.html b/copanier/templates/signing_sheet.html
index 666dcb7..5c5b6d2 100644
--- a/copanier/templates/signing_sheet.html
+++ b/copanier/templates/signing_sheet.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8" />
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
-<h2>{{ delivery.producer }} {{ delivery.when.date() }} - liste d'émargement</h2>
+<h2>{{ delivery.producer }} {{ delivery.from_date.date() }} - liste d'émargement</h2>
 {% for email, order in delivery.orders.items() %}
     <h3>{{ email }}</h3>
     <table class="order">