1 files changed, 64 insertions, 0 deletions
diff --git a/activesupport/CHANGELOG.md b/activesupport/CHANGELOG.md
index 8e63273271..38ec3c0753 100644
--- a/activesupport/CHANGELOG.md
+++ b/activesupport/CHANGELOG.md
@@ -1,3 +1,67 @@
+*   Removed deprecated `Numeric#ago` and friends
+
+    Replacements:
+
+        5.ago   => 5.seconds.ago
+        5.until => 5.seconds.until
+        5.since => 5.seconds.since
+        5.from_now => 5.seconds.from_now
+
+    See #12389 for the history and rationale behind this.
+
+    *Godfrey Chan*
+
+*   DateTime `advance` now supports partial days.
+
+    Before:
+
+        DateTime.now.advance(days: 1, hours: 12)
+
+    After:
+
+        DateTime.now.advance(days: 1.5)
+
+    Fixes #12005.
+
+    *Shay Davidson*
+
+*   `Hash#deep_transform_keys` and `Hash#deep_transform_keys!` now transform hashes
+    in nested arrays.  This change also applies to `Hash#deep_stringify_keys`,
+    `Hash#deep_stringify_keys!`, `Hash#deep_symbolize_keys` and
+    `Hash#deep_symbolize_keys!`.
+
+    *OZAWA Sakuro*
+
+*   Fixed confusing `DelegationError` in `Module#delegate`.
+
+    See #15186.
+
+    *Vladimir Yarotsky*
+
+*   Fixed `ActiveSupport::Subscriber` so that no duplicate subscriber is created
+    when a subscriber method is redefined.
+
+    *Dennis Schön*
+
+*   Remove deprecated string based terminators for `ActiveSupport::Callbacks`.
+
+    *Eileen M. Uchitelle*
+
+*   Fixed an issue when using
+    `ActiveSupport::NumberHelper::NumberToDelimitedConverter` to
+    convert a value that is an `ActiveSupport::SafeBuffer` introduced
+    in 2da9d67.
+
+    See #15064.
+
+    *Mark J. Titorenko*
+
+*   `TimeZone#parse` defaults the day of the month to '1' if any other date
+    components are specified. This is more consistent with the behavior of
+    `Time#parse`.
+
+    *Ulysse Carion*
+
 *   `humanize` strips leading underscores, if any.
 
     Before: