diff --git a/Definitions.md b/Definitions.md
index b1234ca..aa5532c 100644
--- a/Definitions.md
+++ b/Definitions.md
@@ -17,7 +17,7 @@ included in the forge by itself.
     - [ ] Flowtime timmer
 - [ ] Dependencies / blocking visualization
 - [ ] Milestone management
-- [ ] Calendar via due dates
+- [ ] Calendar via due dates (TBD if a build in view or a CalDav URL)
 - [ ] Work session[¹] management
 
 [¹]: Unspecified space of time dedicated exclusively to one task (issue in our case). This allow to do some sort of [time-boxing](https://en.wikipedia.org/wiki/Timeboxing) without committing to a date deadline.