diff --git a/src/pretix/base/services/invoices.py b/src/pretix/base/services/invoices.py
index 5110893b81..1aea794957 100644
--- a/src/pretix/base/services/invoices.py
+++ b/src/pretix/base/services/invoices.py
@@ -214,8 +214,8 @@ def _invoice_generate_german(invoice, f):
         textobject.textLine(str(invoice.event.name))
         if invoice.event.settings.show_date_to:
             textobject.textLines(
-                _('%s\nuntil %s') % (invoice.event.get_date_from_display(),
-                                     invoice.event.get_date_to_display()))
+                _('{from_date}\nuntil {to_date}').format(from_date=invoice.event.get_date_from_display(),
+                                                         to_date=invoice.event.get_date_to_display()))
         else:
             textobject.textLine(invoice.event.get_date_from_display())
         canvas.drawText(textobject)
diff --git a/src/pretix/locale/de/LC_MESSAGES/django.po b/src/pretix/locale/de/LC_MESSAGES/django.po
index 72d055c889..786a6baa06 100644
--- a/src/pretix/locale/de/LC_MESSAGES/django.po
+++ b/src/pretix/locale/de/LC_MESSAGES/django.po
@@ -7,8 +7,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: 1\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-03-15 16:08+0000\n"
-"PO-Revision-Date: 2016-03-15 17:10+0100\n"
+"POT-Creation-Date: 2016-03-15 16:16+0000\n"
+"PO-Revision-Date: 2016-03-15 17:17+0100\n"
 "Last-Translator: Raphael Michel <michel@rami.io>\n"
 "Language-Team: Raphael Michel <michel@rami.io>\n"
 "Language: de\n"
@@ -971,13 +971,13 @@ msgid "Order date"
 msgstr "Bestelldatum"
 
 #: pretix/base/services/invoices.py:217
-#, python-format
+#, python-brace-format
 msgid ""
-"%s\n"
-"until %s"
+"{from_date}\n"
+"until {to_date}"
 msgstr ""
-"%s\n"
-"bis %s"
+"{from_date}\n"
+"bis {to_date}"
 
 #: pretix/base/services/invoices.py:244
 msgctxt "invoice"
@@ -1030,11 +1030,11 @@ msgid "Tax"
 msgstr "Steuer"
 
 #: pretix/base/services/mail.py:64
-#, python-format
-msgid "You are receiving this e-mail because you placed an order for %s."
+#, python-brace-format
+msgid "You are receiving this e-mail because you placed an order for {event}."
 msgstr ""
-"Sie erhalten diese E-Mail, weil Sie eine Bestellung für die Veranstaltung %s "
-"getätigt haben."
+"Sie erhalten diese E-Mail, weil Sie eine Bestellung für die Veranstaltung "
+"{event} getätigt haben."
 
 #: pretix/base/services/orders.py:29
 msgid ""
@@ -4105,6 +4105,13 @@ msgstr "Deutsch"
 msgid "German (informal)"
 msgstr "Deutsch (Du)"
 
+#~ msgid ""
+#~ "%s\n"
+#~ "until %s"
+#~ msgstr ""
+#~ "%s\n"
+#~ "bis %s"
+
 #~ msgid "Order process settings"
 #~ msgstr "Bestellzeile"
 
diff --git a/src/pretix/locale/de_Informal/LC_MESSAGES/django.po b/src/pretix/locale/de_Informal/LC_MESSAGES/django.po
index a0894639cc..3db67f7f55 100644
--- a/src/pretix/locale/de_Informal/LC_MESSAGES/django.po
+++ b/src/pretix/locale/de_Informal/LC_MESSAGES/django.po
@@ -7,8 +7,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: 1\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-03-15 16:08+0000\n"
-"PO-Revision-Date: 2016-03-15 17:11+0100\n"
+"POT-Creation-Date: 2016-03-15 16:16+0000\n"
+"PO-Revision-Date: 2016-03-15 17:17+0100\n"
 "Last-Translator: Raphael Michel <michel@rami.io>\n"
 "Language-Team: Raphael Michel <michel@rami.io>\n"
 "Language: de\n"
@@ -775,7 +775,6 @@ msgid "Percentage"
 msgstr "Prozentsatz"
 
 #: pretix/base/payment.py:130
-#, fuzzy
 msgid "Calculate the fee from the total value including the fee."
 msgstr "Berechne die Gebühr als Anteil vom Endbetrag."
 
@@ -973,13 +972,13 @@ msgid "Order date"
 msgstr "Bestelldatum"
 
 #: pretix/base/services/invoices.py:217
-#, python-format
+#, python-brace-format
 msgid ""
-"%s\n"
-"until %s"
+"{from_date}\n"
+"until {to_date}"
 msgstr ""
-"%s\n"
-"bis %s"
+"{from_date}\n"
+"bis {to_date}"
 
 #: pretix/base/services/invoices.py:244
 msgctxt "invoice"
@@ -1032,11 +1031,11 @@ msgid "Tax"
 msgstr "Steuer"
 
 #: pretix/base/services/mail.py:64
-#, python-format
-msgid "You are receiving this e-mail because you placed an order for %s."
+#, python-brace-format
+msgid "You are receiving this e-mail because you placed an order for {event}."
 msgstr ""
-"Du erhältst diese E-Mail, weil du eine Bestellung für die Veranstaltung %s "
-"getätigt hast."
+"Du erhältst diese E-Mail, weil du eine Bestellung für die Veranstaltung "
+"{event} getätigt hast."
 
 #: pretix/base/services/orders.py:29
 msgid ""
@@ -1965,8 +1964,6 @@ msgid "Change permissions"
 msgstr "Berechtigungen verändern"
 
 #: pretix/control/templates/pretixcontrol/event/permissions.html:21
-#, fuzzy
-#| msgid "Can change vouchers"
 msgid "Change vouchers"
 msgstr "Gutscheine bearbeiten"
 
@@ -2114,7 +2111,6 @@ msgid "Organizer name"
 msgstr "Veranstaltername"
 
 #: pretix/control/templates/pretixcontrol/help/base.html:4
-#, fuzzy
 msgid "Help center"
 msgstr "Hilfe"
 
@@ -4098,6 +4094,13 @@ msgstr "Deutsch"
 msgid "German (informal)"
 msgstr "Deutsch (Du)"
 
+#~ msgid ""
+#~ "%s\n"
+#~ "until %s"
+#~ msgstr ""
+#~ "%s\n"
+#~ "bis %s"
+
 #~ msgid "Order process settings"
 #~ msgstr "Bestellzeile"