diff --git a/src/pretix/base/models/event.py b/src/pretix/base/models/event.py
index 52128a0208..bd004de834 100644
--- a/src/pretix/base/models/event.py
+++ b/src/pretix/base/models/event.py
@@ -96,12 +96,12 @@ class Event(LoggedModel):
     presale_end = models.DateTimeField(
         null=True, blank=True,
         verbose_name=_("End of presale"),
-        help_text=_("No products will be sold after this date."),
+        help_text=_("Optional. No products will be sold after this date."),
     )
     presale_start = models.DateTimeField(
         null=True, blank=True,
         verbose_name=_("Start of presale"),
-        help_text=_("No products will be sold before this date."),
+        help_text=_("Optional. No products will be sold before this date."),
     )
     location = I18nTextField(
         null=True, blank=True,
diff --git a/src/pretix/control/forms/event.py b/src/pretix/control/forms/event.py
index 8ce3ca34df..417d012073 100644
--- a/src/pretix/control/forms/event.py
+++ b/src/pretix/control/forms/event.py
@@ -288,7 +288,7 @@ class EventSettingsForm(SettingsForm):
     reservation_time = forms.IntegerField(
         min_value=0,
         label=_("Reservation period"),
-        help_text=_("The number of minutes the items in a user's card are reserved for this user."),
+        help_text=_("The number of minutes the items in a user's cart are reserved for this user."),
     )
     imprint_url = forms.URLField(
         label=_("Imprint URL"),