diff --git a/README.md b/README.md
index 70d7183..5825372 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,4 @@
 # cal8tor • **cal**endar P**8** extrac**tor**
 WIP
-<!-- no tz support -->
+<!-- tz support only in the .ical output -->
+<!-- .ical output in compliance with https://icalendar.org/validator.html -->