diff --git a/app/listmonk/tasks.py b/app/listmonk/tasks.py
index f6de4fe..342ac47 100644
--- a/app/listmonk/tasks.py
+++ b/app/listmonk/tasks.py
@@ -32,10 +32,9 @@ def send_week():
     elif week.filter(announced=None).exists():
         logger.error("waiting for last item of the week to be public")
     elif not week_obj.published:
-        monday = views.get_monday(now)
         week_obj.published = now
         week_obj.save()
-        if not utils.send_week(now.strftime('%Y-%m-%d')):
+        if not utils.send_week(monday):
             message = "weekly newsletter ready, confirm at https://list.phantas.ma/admin/campaigns"
             r = rpc.send(message, group=settings.SIGNAL_MODERATORS_GROUP)
 
diff --git a/app/listmonk/utils.py b/app/listmonk/utils.py
index 0ea078f..001fa5a 100644
--- a/app/listmonk/utils.py
+++ b/app/listmonk/utils.py
@@ -21,11 +21,10 @@ def get_auth(headers):
     return auth
 
 
-def send_week(date):
+def send_week(monday):
     from . import views
-    year, month, day = date.split('-')
-    date = datetime.strptime(date, '%Y-%m-%d')
-    monday = views.get_monday(date)
+    monday = views.get_monday(monday)
+    year, month, day = monday.split('-')
     body = views.week(year, month, day)
     name = 'weekly-digest-%s' % monday
     subject = 'Phantas.ma weekly update %s' % views.format_week(monday)
diff --git a/app/listmonk/views.py b/app/listmonk/views.py
index 767e84a..2aa4c80 100644
--- a/app/listmonk/views.py
+++ b/app/listmonk/views.py
@@ -34,7 +34,7 @@ def week(year, month, day):
         week=ExtractWeek('published')
     )
     date = datetime.strptime('%s-%s-%s' % (year, month, day), '%Y-%m-%d')
-    week = int(date.strftime('%W'))
+    week = int(date.strftime('%U'))
     year = int(year)
     archive_week = archive.filter(year=year, week=week).order_by('published')
     context['weeks'] = get_weeks(archive)