Update release notes.

CURENT · Dec 8, 2023 · 0651f89 · 0651f89
1 parent 56cd653
commit 0651f89
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/docs/source/release-notes.rst b/docs/source/release-notes.rst
@@ -9,10 +9,13 @@ The APIs before v3.0.0 are in beta and may change without prior notice.
 v1.9 Notes
 ==========
 
-v1.9.0 (2023-09-XX)
+v1.9.0 (2023-12-07)
 -------------------
 - Initially, ``dae.t`` is set to ``-1.0`` during power flow calculation. TDS
   initialization will set ``dae.t = 0.0``.
+- Rewritten the islanding detection algorithm.
+- In ``system.py``, import ``importlib.util`` to workaround unexported `util`
+  module in Python 3.10.
 
 v1.8 Notes
 ==========