diff --git a/www/conservancy/apps/news/templatetags/date_within.py b/www/conservancy/apps/news/templatetags/date_within.py
new file mode 100644
index 0000000000000000000000000000000000000000..5213759d2093aea11eac34d56619ecdb7be9fb80
--- /dev/null
+++ b/www/conservancy/apps/news/templatetags/date_within.py
@@ -0,0 +1,9 @@
+from django import template
+from datetime import timedelta, datetime
+
+register = template.Library()
+
+@register.filter
+def date_within_past_days(value, arg):
+    # question: does datetime.now() do a syscall each time is it called?
+    return value > (datetime.now() - timedelta(days=int(arg)))