diff --git a/CHANGELOG.md b/CHANGELOG.md
index b71e04f04..ba8690562 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ All notable changes to this project will be documented in this file.
 - Commands ``Sensor12 D0 .. D5, S0 .. S5`` allowing differential or single-ended modes (#15001)
 - NeoPool commands ``NPpHMin``, ``NPpHMax``, ``NPpH``, ``NPRedox``, ``NPHydrolysis``, ``NPIonization``, ``NPChlorine`` and ``NPControl`` (#15015)
 - NeoPool system voltages display
+- Full DS3231 integration and synchronisation when using UBX (=GPS), NTP or manual time
 
 ### Changed
 - Extent number of pulsetimers from 8 to 32 (#8266)
diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 113515c61..d11895c16 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -111,6 +111,7 @@ The latter links can be used for OTA upgrades too like ``OtaUrl http://ota.tasmo
 - NeoPool commands ``NPpHMin``, ``NPpHMax``, ``NPpH``, ``NPRedox``, ``NPHydrolysis``, ``NPIonization``, ``NPChlorine`` and ``NPControl`` [#15015](https://github.com/arendst/Tasmota/issues/15015)
 - NeoPool system voltages display
 - TasmotaSerial implement ``end()``
+- Full DS3231 integration and synchronisation when using UBX (=GPS), NTP or manual time
 - ESP32 Berry always enable rules
 - ESP32 Berry bootloop protection
 - ESP32 support for BLE Mi scale V1 [#13517](https://github.com/arendst/Tasmota/issues/13517)