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+* Fix implicit coercion calculations with scalars and durations
+
+ Previously calculations where the scalar is first would be converted to a duration
+ of seconds but this causes issues with dates being converted to times, e.g:
+
+ Time.zone = "Beijing" # => Asia/Shanghai
+ date = Date.civil(2017, 5, 20) # => Mon, 20 May 2017
+ 2 * 1.day # => 172800 seconds
+ date + 2 * 1.day # => Mon, 22 May 2017 00:00:00 CST +08:00
+
+ Now the `ActiveSupport::Duration::Scalar` calculation methods will try to maintain
+ the part structure of the duration where possible, e.g:
+
+ Time.zone = "Beijing" # => Asia/Shanghai
+ date = Date.civil(2017, 5, 20) # => Mon, 20 May 2017
+ 2 * 1.day # => 2 days
+ date + 2 * 1.day # => Mon, 22 May 2017
+
+ Fixes #29160, #28970.
+
+ *Andrew White*
+
+* Add support for versioned cache entries. This enables the cache stores to recycle cache keys, greatly saving
+ on storage in cases with frequent churn. Works together with the separation of `#cache_key` and `#cache_version`
+ in Active Record and its use in Action Pack's fragment caching.
+
+ *DHH*
+
* Pass gem name and deprecation horizon to deprecation notifications.
*Willem van Bergen*