diff --git a/oioioi/contests/forms.py b/oioioi/contests/forms.py
index 193dd03fd..2d1c3dfe0 100644
--- a/oioioi/contests/forms.py
+++ b/oioioi/contests/forms.py
@@ -46,7 +46,7 @@ def validate_years(year):
 
     school_year = forms.CharField(
         required=False,
-        label=_("School year"),
+        label=_("School year (format: yyyy/yyyy)"),
         validators=[
             RegexValidator(
                 regex=r"^[0-9]{4}[/][0-9]{4}$",