diff --git a/CHANGELOG.md b/CHANGELOG.md
index f9bd98450..64044f31f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # HDMF Changelog
 
-## HDMF 3.12.0 (Upcoming)
+## HDMF 3.12.0 (January 17, 2024)
 
 ### Enhancements
 - Add Data.set_data_io(), which allows for setting a `DataIO` to a data object after-the-fact. @bendichter and @CodyCBakerPhD [#1013](https://github.com/hdmf-dev/hdmf/pull/1013)