diff --git a/generate_ical.py b/generate_ical.py
index c61a024..8f4372f 100644
--- a/generate_ical.py
+++ b/generate_ical.py
@@ -77,6 +77,17 @@ for trash_type in trash_types:
   if not os.path.exists(trash_type_folder):
     os.makedirs(trash_type_folder)
 
+  for f in next(os.walk(trash_type_folder), (None, None, []))[2]:
+    ical_path = os.path.join(trash_type_folder, f)
+    with open(ical_path, "rb") as fh:
+      try:
+        cal = icalendar.Calendar.from_ical(fh.read())
+      except ValueError:
+        print("{} is not an parsable ical file".format(ical_path))
+        continue
+      if cal.walk()[1]["DTSTAMP"].dt.year == current_year:
+        os.remove(ical_path)
+
   radicale_prop_file = os.path.join(trash_type_folder, ".Radicale.props")
   with open(radicale_prop_file, "w") as f:
     f.write(json.dumps(radicale_props))
@@ -95,7 +106,7 @@ for trash_type in trash_types:
       new_cal.add('prodid', 'Trash dates')
       new_cal.add('version', '2.0')
       new_cal.add_component(event)
-      ical_name = "{}.ical".format(uid)
+      ical_name = "{}_{}.ical".format(current_year, uid)
       ical_path = os.path.join(trash_type_folder, ical_name)
       with open(ical_path, "wb") as single_file:
         single_file.write(new_cal.to_ical())