diff --git a/gergelypolonkaieu_site/plugins/custom_roles.py b/gergelypolonkaieu_site/plugins/custom_roles.py
index 7ce07dd..9012b2d 100644
--- a/gergelypolonkaieu_site/plugins/custom_roles.py
+++ b/gergelypolonkaieu_site/plugins/custom_roles.py
@@ -1,3 +1,5 @@
+from datetime import datetime
+
 from docutils import nodes
 from docutils.parsers import rst
 
@@ -14,10 +16,21 @@ def del_role(name, rawtext, text, lineno, inliner, options=None, content=None):
     return [nodes.raw('', f'<del>{text}</del>', format='html')], []
 
 
+def exp_years_role(*args, **kwargs):
+    now = datetime.utcnow()
+    exp_range = now - datetime(1993, 9, 1)
+    exp_years = int(exp_range.total_seconds() / 31536000)
+
+    html_text = f'<span class="definition" title="As of {now.year}">{exp_years}</span>'
+
+    return [nodes.raw('', html_text, format='html')], []
+
+
 def register_roles():
     rst.roles.register_local_role('kbd', keyboard_role)
     rst.roles.register_local_role('sup', superscript_role)
     rst.roles.register_local_role('del', del_role)
+    rst.roles.register_local_role('exp_years', exp_years_role)
 
 
 def register():