diff --git a/seminar/templatetags/deadliny.py b/seminar/templatetags/deadliny.py
new file mode 100644
index 00000000..29ea5c79
--- /dev/null
+++ b/seminar/templatetags/deadliny.py
@@ -0,0 +1,24 @@
+from django import template
+from seminar.utils import TypDeadline, deadline
+register = template.Library()
+
+@register.filter(name='deadline')
+def deadline_text(datum):
+	typ, cislo, deadline = deadline(datum)
+	strings = {
+		TypDeadline.PredDeadline: f"1. deadline čísla {cislo} ({datum})",
+		TypDeadline.SousDeadline: f"Soustřeďkový deadline čísla {cislo} ({datum})",
+		TypDeadline.FinalDeadline: f"Finální deadline čísla {cislo} ({datum})",
+		}
+	return strings[typ]
+
+@register.filter(name='deadline_html')
+def deadline_html(datum):
+	typ, _, _ = deadline(datum)
+	text = deadline_text(datum)
+	classes = {
+		TypDeadline.PredDeadline: 'preddeadline',
+		TypDeadline.SousDeadline: 'sous_deadline',
+		TypDeadline.FinalDeadline: 'final_deadline',
+		}
+	return f'<span class="{classes[typ]}">{text}</span>'