diff --git a/singletons-base/CHANGES.md b/singletons-base/CHANGES.md
index f92d54be..c5c604b0 100644
--- a/singletons-base/CHANGES.md
+++ b/singletons-base/CHANGES.md
@@ -1,7 +1,7 @@
 Changelog for the `singletons-base` project
 ===========================================
 
-3.3 [????.??.??]
+3.3 [2023.10.13]
 ----------------
 * Require building with GHC 9.8.
 * All singleton types with `SEq` or `SOrd` instances now have `Eq` or `Ord`
diff --git a/singletons-th/CHANGES.md b/singletons-th/CHANGES.md
index da43df03..c497c378 100644
--- a/singletons-th/CHANGES.md
+++ b/singletons-th/CHANGES.md
@@ -1,7 +1,7 @@
 Changelog for the `singletons-th` project
 =========================================
 
-3.3 [????.??.??]
+3.3 [2023.10.13]
 ----------------
 * Require building with GHC 9.8.
 * Singled data types with derived `Eq` or `Ord` instances now generate `Eq` or