diff --git a/docs/environments.md b/docs/environments.md
index bb4b930c8..251dc33cb 100644
--- a/docs/environments.md
+++ b/docs/environments.md
@@ -437,5 +437,25 @@ The OpenEnv community has built a catalog of ready-to-run environments that cove
+
+
+
+ Calendar Gym
+
+ This environment exposes a Calendar Gym tools through the OpenEnv reset/step/state interface. The server runs a FastAPI app that serves the OpenEnv endpoints.
+