diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2286aea46..72eea40c1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - Chat reactions
 
+## 5.1.3 - Undefined
+
+### Fixed
+- Wrong dates from DatePicker.
+- Update SDK to 5.2.98
+
 ## 5.1.2 - 2023-08-25
 
 ### Fixed
diff --git a/linphone-app/CMakeLists.txt b/linphone-app/CMakeLists.txt
index fb89135ec..a9134ce17 100644
--- a/linphone-app/CMakeLists.txt
+++ b/linphone-app/CMakeLists.txt
@@ -293,6 +293,7 @@ set(SOURCES
 	src/components/other/colors/ColorListModel.cpp
 	src/components/other/colors/ColorProxyModel.cpp
 	src/components/other/colors/ImageColorsProxyModel.cpp
+	src/components/other/date/DateModel.cpp
 	src/components/other/images/ImageModel.cpp
 	src/components/other/images/ImageListModel.cpp
 	src/components/other/images/ImageProxyModel.cpp
@@ -439,6 +440,7 @@ set(HEADERS
 	src/components/other/colors/ColorListModel.hpp
 	src/components/other/colors/ColorProxyModel.hpp
 	src/components/other/colors/ImageColorsProxyModel.hpp
+	src/components/other/date/DateModel.hpp
 	src/components/other/images/ImageModel.hpp
 	src/components/other/images/ImageListModel.hpp
 	src/components/other/images/ImageProxyModel.hpp
diff --git a/linphone-app/src/app/App.cpp b/linphone-app/src/app/App.cpp
index 9dbe87445..e6f115c11 100644
--- a/linphone-app/src/app/App.cpp
+++ b/linphone-app/src/app/App.cpp
@@ -52,6 +52,7 @@
 #include "utils/Utils.hpp"
 #include "utils/Constants.hpp"
 #include "components/other/desktop-tools/DesktopTools.hpp"
+#include "components/other/date/DateModel.hpp"
 
 #include "components/settings/EmojisSettingsModel.hpp"
 #include "components/timeline/TimelineModel.hpp"
@@ -284,6 +285,9 @@ App::App (int &argc, char *argv[]) : SingleApplication(argc, argv, true, Mode::U
 	
 	qInfo() << QStringLiteral("Starting " APPLICATION_NAME " (bin: " EXECUTABLE_NAME ")");
 	qInfo() << QStringLiteral("Use locale: %1 with language: %2").arg(mLocale.name()).arg(QLocale::languageToString(mLocale.language()));
+	qInfo() << QStringLiteral("System timezone: code=%1 / country=%2 / Offset=%3 / ID=%4").arg(QTimeZone::systemTimeZone().country()).arg(Utils::getCountryName(QTimeZone::systemTimeZone().country()))
+			   .arg(QTimeZone::systemTimeZone().standardTimeOffset(QDateTime::currentDateTime()))
+			   .arg(QString(QTimeZone::systemTimeZoneId()));
 	
 	// Deal with received messages and CLI.
 	QObject::connect(this, &App::receivedMessage, this, [](int, const QByteArray &byteArray) {
@@ -730,6 +734,7 @@ void App::registerTypes () {
 	registerType<ContactsListProxyModel>("ContactsListProxyModel");
 	registerType<ContactsImporterListProxyModel>("ContactsImporterListProxyModel");
 	registerType<ContentProxyModel>("ContentProxyModel");
+	registerType<DateModel>("DateModel");
 	registerType<FileDownloader>("FileDownloader");
 	registerType<FileExtractor>("FileExtractor");
 	registerType<HistoryProxyModel>("HistoryProxyModel");
diff --git a/linphone-app/src/components/conferenceInfo/ConferenceInfoListModel.cpp b/linphone-app/src/components/conferenceInfo/ConferenceInfoListModel.cpp
index b889ecf02..2e97e443d 100644
--- a/linphone-app/src/components/conferenceInfo/ConferenceInfoListModel.cpp
+++ b/linphone-app/src/components/conferenceInfo/ConferenceInfoListModel.cpp
@@ -89,7 +89,7 @@ QVariant ConferenceInfoListModel::data (const QModelIndex &index, int role ) con
 		if (role == Qt::DisplayRole)
 			return QVariant::fromValue(mList[row].get());
 		else if (role == Qt::DisplayRole +1 )
-			return QVariant::fromValue(mList[row].objectCast<ConferenceInfoModel>()->getDateTimeSystem().date());
+			return QVariant::fromValue(Utils::toDateString(mList[row].objectCast<ConferenceInfoModel>()->getDateTimeSystem()));
 		return QVariant();
 }
 	
@@ -122,4 +122,4 @@ void ConferenceInfoListModel::onRemoved(bool byUser){
 		remove(sender());
 }
 	
-	
\ No newline at end of file
+	
diff --git a/linphone-app/src/components/conferenceInfo/ConferenceInfoModel.cpp b/linphone-app/src/components/conferenceInfo/ConferenceInfoModel.cpp
index 95d615c0c..4aa339a07 100644
--- a/linphone-app/src/components/conferenceInfo/ConferenceInfoModel.cpp
+++ b/linphone-app/src/components/conferenceInfo/ConferenceInfoModel.cpp
@@ -133,8 +133,8 @@ void ConferenceInfoModel::initDateTime(){
 		setDateTime(QDateTime::fromMSecsSinceEpoch(0));
 		setDuration(0);
 	}else{
-		setDateTime(QDateTime::currentDateTimeUtc());
-		setDuration(1200);
+		setDateTime(QDateTime::currentDateTime());
+		setDuration(60);
 	}
 }
 
@@ -144,7 +144,7 @@ QDateTime ConferenceInfoModel::getDateTimeUtc() const{
 }
 
 QDateTime ConferenceInfoModel::getDateTimeSystem() const{
-	return QDateTime::fromMSecsSinceEpoch(mConferenceInfo->getDateTime() * 1000, QTimeZone::systemTimeZone());
+	return QDateTime::fromMSecsSinceEpoch(mConferenceInfo->getDateTime() * 1000, Qt::LocalTime);
 }
 
 int ConferenceInfoModel::getDuration() const{
diff --git a/linphone-app/src/components/history/HistoryModel.cpp b/linphone-app/src/components/history/HistoryModel.cpp
index 15b5d6264..b0e0ced54 100644
--- a/linphone-app/src/components/history/HistoryModel.cpp
+++ b/linphone-app/src/components/history/HistoryModel.cpp
@@ -111,8 +111,9 @@ QVariant HistoryModel::data (const QModelIndex &index, int role) const {
 		auto &data = mEntries[row].first;
 		return QVariant::fromValue(data);
 	}
-	case Roles::SectionDate:
-		return QVariant::fromValue(mEntries[row].first["receivedTimestamp"].toDate());
+	case Roles::SectionDate:{
+		return QVariant::fromValue(Utils::toDateString(mEntries[row].first["receivedTimestamp"].toDateTime()));
+	}
 	}
 	
 	return QVariant();
diff --git a/linphone-app/src/components/other/date/DateModel.cpp b/linphone-app/src/components/other/date/DateModel.cpp
new file mode 100644
index 000000000..2681a71c7
--- /dev/null
+++ b/linphone-app/src/components/other/date/DateModel.cpp
@@ -0,0 +1,56 @@
+#include "DateModel.hpp"
+
+#include <QDateTime>
+#include <QDebug>
+
+#include "utils/Utils.hpp"
+DateModel::DateModel(QObject * parent) : QObject(parent){
+}
+
+DateModel::DateModel(QDate date, QObject * parent) : QObject(parent), QDate(date) {
+}
+
+DateModel::~DateModel(){
+}
+
+int DateModel::getYear() const{
+	return QDate::year();
+}
+
+void DateModel::setYear(int year){
+	QDate::setDate(year, month(), day());
+	emit yearChanged();
+}
+
+int DateModel::getMonth() const{
+	return month();
+}
+void DateModel::setMonth(int month){
+	QDate::setDate(year(), month, day());
+	emit monthChanged();
+}
+
+int DateModel::getDay() const{
+	return day();
+}
+
+void DateModel::setDay(int day) {
+	QDate::setDate(year(), month(), day);
+	emit dayChanged();
+}
+
+int DateModel::dayOfWeek() const {
+	return QDate::dayOfWeek();
+}
+
+bool DateModel::isEqual(DateModel * model)  {
+	return *dynamic_cast<QDate*>(this) == *dynamic_cast< QDate*>(model);
+}
+
+bool DateModel::isGreatherThan(DateModel * model) {
+	return *dynamic_cast<QDate*>(this) >= *dynamic_cast<QDate*>(model);
+}
+
+QString DateModel::toDateString(const QString& format) const {
+	return Utils::toDateString(*this, format);
+}
\ No newline at end of file
diff --git a/linphone-app/src/components/other/date/DateModel.hpp b/linphone-app/src/components/other/date/DateModel.hpp
new file mode 100644
index 000000000..74d13ea97
--- /dev/null
+++ b/linphone-app/src/components/other/date/DateModel.hpp
@@ -0,0 +1,39 @@
+#ifndef DATE_MODEL_H
+#define DATE_MODEL_H
+
+#include <QObject>
+#include <QDate>
+
+class DateModel: public QObject, public QDate{
+    Q_OBJECT
+    Q_PROPERTY(int year READ getYear WRITE setYear NOTIFY yearChanged)
+    Q_PROPERTY(int month READ getMonth WRITE setMonth NOTIFY monthChanged)
+    Q_PROPERTY(int day READ getDay WRITE setDay NOTIFY dayChanged)
+
+public:
+    DateModel(QObject * parent = 0);
+    DateModel(QDate date, QObject * parent = 0);
+    ~DateModel();
+
+	int getYear() const;
+	void setYear(int year);
+	
+	int getMonth() const;
+	void setMonth(int month);
+	
+	int getDay() const;
+	void setDay(int day);
+	
+	Q_INVOKABLE int dayOfWeek() const;
+	Q_INVOKABLE bool isEqual(DateModel * model);
+	Q_INVOKABLE bool isGreatherThan(DateModel * model);
+	Q_INVOKABLE QString toDateString(const QString& format = "yyyy/MM/dd") const;
+signals:
+    void yearChanged();
+    void monthChanged();
+    void dayChanged();
+
+};
+Q_DECLARE_METATYPE(DateModel*);
+
+#endif
diff --git a/linphone-app/src/components/other/timeZone/TimeZoneListModel.cpp b/linphone-app/src/components/other/timeZone/TimeZoneListModel.cpp
index a0721a110..2307e2a19 100644
--- a/linphone-app/src/components/other/timeZone/TimeZoneListModel.cpp
+++ b/linphone-app/src/components/other/timeZone/TimeZoneListModel.cpp
@@ -73,10 +73,19 @@ QVariant TimeZoneListModel::data (const QModelIndex &index, int role) const {
 }
 
 int TimeZoneListModel::get (const QTimeZone& timeZone) const {
-	const auto it = find_if(
+	auto it = find_if(
 				mList.cbegin(), mList.cend(), [&timeZone](QSharedPointer<QObject> item) {
 		return item.objectCast<TimeZoneModel>()->getTimeZone() == timeZone;
 	}
 	);
+	if(it == mList.cend()) {
+		auto today = QDateTime::currentDateTime();
+		it = find_if(
+				mList.cbegin(), mList.cend(), [&timeZone, today](QSharedPointer<QObject> item) {
+				auto tz = item.objectCast<TimeZoneModel>()->getTimeZone();
+			   return (timeZone.country() == QLocale::AnyCountry || tz.country() == timeZone.country()) && tz.standardTimeOffset(today) == timeZone.standardTimeOffset(today);
+		   }
+		   );
+	}
 	return it != mList.cend() ? int(distance(mList.cbegin(), it)) : 0;
 }
diff --git a/linphone-app/src/utils/Utils.cpp b/linphone-app/src/utils/Utils.cpp
index e758f3af1..f252179b9 100644
--- a/linphone-app/src/utils/Utils.cpp
+++ b/linphone-app/src/utils/Utils.cpp
@@ -47,6 +47,7 @@
 #include "components/core/CoreManager.hpp"
 #include "components/other/colors/ColorListModel.hpp"
 #include "components/other/colors/ColorModel.hpp"
+#include "components/other/date/DateModel.hpp"
 #include "components/contacts/ContactsListModel.hpp"
 #include "components/contact/ContactModel.hpp"
 #include "components/contact/VcardModel.hpp"
@@ -104,6 +105,8 @@ bool Utils::hasCapability(const QString& address, const LinphoneEnums::FriendCap
 		return defaultCapability;
 }
 
+//--------------------------------------------------------------------------------------
+
 QDateTime Utils::addMinutes(QDateTime date, const int& min){
 	return date.addSecs(min*60);
 }
@@ -112,7 +115,7 @@ QDateTime Utils::getOffsettedUTC(const QDateTime& date){
 	QDateTime utc = date.toUTC();// Get a date free of any offsets.
 	auto timezone = date.timeZone();
 	utc = utc.addSecs(timezone.offsetFromUtc(date));// add offset from date timezone
-	utc.setTimeSpec(Qt::UTC);// ensure to have an UTC date
+	utc.setTimeSpec(Qt::OffsetFromUTC);// ensure to have an UTC date
 	return utc;
 }
 
@@ -133,6 +136,10 @@ QString Utils::toDateString(QDateTime date, const QString& format){
 	return QLocale().toString(getOffsettedUTC(date), (!format.isEmpty() ? format : QLocale().dateFormat()) );
 }
 
+QString Utils::toDateString(QDate date, const QString& format){
+	return QLocale().toString(date, (!format.isEmpty() ? format : QLocale().dateFormat()) );
+}
+
 // Return custom address to be displayed on UI.
 // In order to return only the username and to remove all domains from the GUI, you may just change the default mode.
 QString Utils::toDisplayString(const QString& str, SipDisplayMode displayMode){
@@ -147,6 +154,74 @@ QString Utils::toDisplayString(const QString& str, SipDisplayMode displayMode){
 		return displayString;
 }
 
+QDate Utils::getCurrentDate() {
+	return QDate::currentDate();
+}
+
+DateModel* Utils::getCurrentDateModel() {
+	return new DateModel(QDate::currentDate());
+}
+
+QDate Utils::getMinDate() {
+	return QDate(1,1,1);
+}
+DateModel* Utils::getMinDateModel() {
+	return new DateModel(QDate(1,1,1));
+}
+QDate Utils::toDate(const QString& str, const QString& format) {
+	return QDate::fromString(str, format);
+}
+DateModel* Utils::toDateModel(const QString& str, const QString& format) {
+	return new DateModel(toDate(str, format));
+}
+QDate Utils::getDate(int year, int month, int day) {
+	auto d = QDate(year, month, day);
+	if(!d.isValid() ){
+		auto first = QDate(year, month, 1);
+		if(first.isValid()) {
+			d = first.addDays(day-1);
+		}
+	}
+	return d;
+}
+
+DateModel* Utils::getDateModel(int year, int month, int day) {
+	auto d = QDate(year, month, day);
+	if(!d.isValid() ){
+		auto first = QDate(year, month, 1);
+		if(first.isValid()) {
+			d = first.addDays(day-1);
+		}
+	}
+	return new DateModel(d);
+}
+
+int Utils::getFullYear(const QDate& date) {
+	return date.year();
+}
+
+int Utils::getMonth(const QDate& date) {
+	return date.month();
+}
+
+int Utils::getDay(const QDate& date) {
+	return date.day();
+}
+
+int Utils::getDayOfWeek(const QDate& date) {
+	return date.dayOfWeek();
+}
+
+bool Utils::equals(const QDate& d1, const QDate& d2){
+	return d1 == d2;
+}
+
+bool Utils::isGreatherThan(const QDate& d1, const QDate& d2) {
+	return d1 >= d2;
+}
+
+//--------------------------------------------------------------------------------------
+
 QString Utils::getDisplayName(const QString& address){
 	return getDisplayName(interpretUrl(address));
 }
diff --git a/linphone-app/src/utils/Utils.hpp b/linphone-app/src/utils/Utils.hpp
index aedcd0af9..61834890e 100644
--- a/linphone-app/src/utils/Utils.hpp
+++ b/linphone-app/src/utils/Utils.hpp
@@ -34,6 +34,7 @@
 
 class QAction;
 class QWidget;
+class DateModel;
 
 // =============================================================================
 
@@ -64,12 +65,29 @@ public:
 	
 	// Qt interfaces	
 	Q_INVOKABLE static bool hasCapability(const QString& address, const LinphoneEnums::FriendCapability& capability, bool defaultCapability = true);
+//***** DATE TIME
 	Q_INVOKABLE static QDateTime addMinutes(QDateTime date, const int& min);
 	static QDateTime getOffsettedUTC(const QDateTime& date);
 	Q_INVOKABLE static QString toDateTimeString(QDateTime date);
 	Q_INVOKABLE static QString toTimeString(QDateTime date, const QString& format = "hh:mm:ss");
 	Q_INVOKABLE static QString toDateString(QDateTime date, const QString& format = "");
+	Q_INVOKABLE static QString toDateString(QDate date, const QString& format = "");
 	Q_INVOKABLE static QString toDisplayString(const QString& str, SipDisplayMode displayMode = SIP_DISPLAY_ALL);
+	Q_INVOKABLE static QDate getCurrentDate();
+	Q_INVOKABLE static DateModel* getCurrentDateModel();
+	Q_INVOKABLE static QDate getMinDate();
+	Q_INVOKABLE static DateModel* getMinDateModel();
+	Q_INVOKABLE static QDate toDate(const QString& str, const QString& format = "yyyy/MM/dd");
+	Q_INVOKABLE static QDate getDate(int year, int month, int day);
+	Q_INVOKABLE static DateModel* toDateModel(const QString& str, const QString& format = "yyyy/MM/dd");
+	Q_INVOKABLE static DateModel* getDateModel(int year, int month, int day);
+	Q_INVOKABLE static int getFullYear(const QDate& date);
+	Q_INVOKABLE static int getMonth(const QDate& date);
+	Q_INVOKABLE static int getDay(const QDate& date);
+	Q_INVOKABLE static int getDayOfWeek(const QDate& date);
+	Q_INVOKABLE static bool equals(const QDate& d1, const QDate& d2);	// Override JS '==' operator
+	Q_INVOKABLE static bool isGreatherThan(const QDate& d1, const QDate& d2); // Override JS '>=' operator
+//*****
 	static void cleanDisplayNameCache(const QString& address = "");// if "", clean all cache
 	Q_INVOKABLE static QString getDisplayName(const QString& address);
 	Q_INVOKABLE static QString getInitials(const QString& username);	// Support UTF32
diff --git a/linphone-app/ui/modules/Common/Picker/DatePicker.qml b/linphone-app/ui/modules/Common/Picker/DatePicker.qml
index 115f0118a..b8ca62322 100644
--- a/linphone-app/ui/modules/Common/Picker/DatePicker.qml
+++ b/linphone-app/ui/modules/Common/Picker/DatePicker.qml
@@ -5,6 +5,7 @@ import Common 1.0
 import Common.Styles 1.0
 import Linphone 1.0
 import Units 1.0
+import UtilsCpp 1.0
 
 import 'qrc:/ui/scripts/Utils/utils.js' as Utils
 
@@ -13,8 +14,9 @@ Item{
 	property bool allYears : false	// if false : years from today
 	property alias selectedDate: monthList.selectedDate
 	property bool hideOldDates : false
-	
-	signal clicked(date date);
+	property DateModel currentDate: UtilsCpp.getCurrentDateModel()
+	Component.onDestruction: {gc()}	// Call gc to free all DateModels
+	signal clicked(var date);
 	
 	RowLayout {
 		id: headerRow
@@ -36,7 +38,7 @@ Item{
 			Layout.fillWidth: true
 			Layout.alignment: Qt.AlignCenter
 			horizontalAlignment: Qt.AlignCenter
-			text: new Date(monthList.currentYear, monthList.currentMonth, 15).toLocaleString(App.locale, 'MMMM yyyy')// 15 because of timezones that can change the date for localeString
+			text: new Date(monthList.currentYear, monthList.currentMonth-1, 15).toLocaleString(App.locale, 'MMMM yyyy')// 15 because of timezones that can change the date for localeString
 			color: DatePickerStyle.title.colorModel.color
 			font.pointSize: DatePickerStyle.title.pointSize
 			font.capitalization: Font.Capitalize
@@ -60,23 +62,25 @@ Item{
 		property int maxYears: 5	// Max years to be requested.
 		
 		function set(date) {
-			selectedDate = new Date(date)
-			var moveTo = (selectedDate.getFullYear()-minYear) * 12 + selectedDate.getMonth()
-			currentIndex = moveTo
+			if(date) {
+				selectedDate = date
+				var moveTo = (selectedDate.year-minYear) * 12 + selectedDate.month - 1
+				currentIndex = moveTo
+			}
 		}
 		
-		property date selectedDate: new Date()
-		property int minYear: mainItem.allYears ? new Date(0,0,1).getFullYear() : new Date().getFullYear()
+		property DateModel selectedDate: mainItem.currentDate
+		property int minYear: (mainItem.allYears ? UtilsCpp.getMinDateModel() : mainItem.currentDate).year
 		
 		snapMode:    ListView.SnapOneItem
 		orientation: Qt.Horizontal
 		clip:        true
 		
 		// One model per month
-		model: (new Date().getFullYear()- minYear + maxYears) * 12
+		model: (mainItem.currentDate.year - minYear + maxYears) * 12
 		currentIndex: 0
 		property int currentYear:      Math.floor(currentIndex / 12) + minYear
-		property int currentMonth:     currentIndex % 12
+		property int currentMonth:     currentIndex % 12 + 1
 		
 		highlightFollowsCurrentItem: true
 		highlightRangeMode: ListView.StrictlyEnforceRange
@@ -89,8 +93,8 @@ Item{
 			height: monthList.height == 0 ? 100 : monthList.height
 			
 			property int year:      Math.floor(index / 12) + monthList.minYear 
-			property int month:     index % 12
-			property int firstDay:  new Date(year, month, 1).getDay()
+			property int month:     index % 12 + 1
+			property int firstDay:  UtilsCpp.getDateModel(year, month, 1).dayOfWeek();
 			
 			GridLayout { // 1 month calender
 				id: grid
@@ -109,12 +113,12 @@ Item{
 					
 					delegate: Item{
 						id: cellItem
-						property int day: index - 7 // 0 = top left below Sunday (-7 to 41)
-						property int date: day - firstDay + 1 // 1-31
-						property date cellDate: new Date(year, month, date)
+						property int dayIndex: index - 7 // 0 = top left below Sunday (-7 to 41)
+						property int date: dayIndex - firstDay + 1// 1-31
+						property DateModel cellDate: UtilsCpp.getDateModel(year, month, date)
 						property bool selected : text.text != '-' 
-											&& Utils.equalDate(cellDate, monthList.selectedDate)
-											&& text.text && day >= 0
+											&& text.text && dayIndex >= 0
+											&& cellDate.isEqual(monthList.selectedDate)	// Do not use == as it will compare JS Date.
 						width: grid.cellMinSize
 						height: width
 						
@@ -136,15 +140,15 @@ Item{
 								color: DatePickerStyle.cell.colorModel.color
 								font.pixelSize: cellItem.selected 
 													? DatePickerStyle.cell.selectedPointSize
-													: cellItem.day < 0 
+													: cellItem.dayIndex < 0
 														? DatePickerStyle.cell.dayHeaderPointSize
 														: DatePickerStyle.cell.dayPointSize
-								font.bold: cellItem.day < 0 || cellItem.selected || Utils.equalDate(cellItem.cellDate, new Date()) // today
+								font.bold: cellItem.dayIndex < 0 || cellItem.selected || (cellItem.cellDate && cellItem.cellDate.isEqual(mainItem.currentDate)) // today
 								text: {
-									if(cellItem.day < 0){
+									if(cellItem.dayIndex < 0){
 										// Magic date to set day names in this order : 'S', 'M', 'T', 'W', 'T', 'F', 'S' in Locale
 										return App.locale.dayName(index)[0].toUpperCase()
-									}else if(cellItem.cellDate.getMonth() == month && (!hideOldDates || new Date(year, month, cellItem.date+1) >= new Date()))	// new Date use time too
+									}else if(cellItem.cellDate && cellItem.cellDate.month == month && (!hideOldDates || cellItem.cellDate.isGreatherThan(currentDate)))
 										return cellItem.date
 									else
 										return '-'
@@ -156,7 +160,7 @@ Item{
 							id: mouseArea
 							
 							anchors.fill: parent
-							enabled:    text.text && text.text != '-' &&  cellItem.day >= 0
+							enabled:    text.text && text.text != '-' &&  cellItem.dayIndex >= 0
 							
 							onClicked: {
 								monthList.selectedDate = cellItem.cellDate
diff --git a/linphone-app/ui/modules/Linphone/History/History.qml b/linphone-app/ui/modules/Linphone/History/History.qml
index f6242bb1d..f4ed638ca 100644
--- a/linphone-app/ui/modules/Linphone/History/History.qml
+++ b/linphone-app/ui/modules/Linphone/History/History.qml
@@ -102,7 +102,7 @@ Rectangle {
               horizontalAlignment: Text.AlignHCenter
               verticalAlignment: Text.AlignVCenter
 
-              text: UtilsCpp.toDateString(section)
+              text: section
             }
           }
         }
diff --git a/linphone-app/ui/views/App/Dialog/NewConference.qml b/linphone-app/ui/views/App/Dialog/NewConference.qml
index 050f7a958..24b477fe5 100644
--- a/linphone-app/ui/views/App/Dialog/NewConference.qml
+++ b/linphone-app/ui/views/App/Dialog/NewConference.qml
@@ -20,7 +20,7 @@ DialogPlus {
 	property bool isNew: !conferenceInfoModel || conferenceInfoModel.uri === ''
 	property ConferenceInfoModel conferenceInfoModel: ConferenceInfoModel{}
 	onConferenceInfoModelChanged: {
-		dateField.setDate(conferenceManager.conferenceInfoModel.dateTime);
+		dateField.setDateString(UtilsCpp.toDateString(conferenceManager.conferenceInfoModel.dateTime, 'yyyy/MM/dd'));
 		timeField.setTime(UtilsCpp.toTimeString(conferenceManager.conferenceInfoModel.dateTime , 'hh:mm'));
 		selectedParticipants.setAddresses(conferenceInfoModel)
 	}
@@ -130,7 +130,7 @@ DialogPlus {
 				}
 				conferenceManager.creationState = 1
 				if( scheduledSwitch.checked){
-					conferenceInfoModel.setDateTime(dateField.getDate(), timeField.getTime()+':00', timeZoneField.model.getAt(timeZoneField.currentIndex) )
+					conferenceInfoModel.setDateTime(UtilsCpp.toDate(dateField.getDateString(), 'yyyy/MM/dd'), timeField.getTime()+':00', timeZoneField.model.getAt(timeZoneField.currentIndex) )
 					conferenceInfoModel.duration = durationField.model[durationField.currentIndex].value
 				}else{
 					conferenceInfoModel.isScheduled = false
@@ -181,7 +181,7 @@ DialogPlus {
 	height: window.height - 100
 	width: window.width - 100
 	expandHeight: true
-	
+	Component.onDestruction: gc()	// Free DateModels from memory
 	// ---------------------------------------------------------------------------
 	RowLayout {
 		height: parent.height
@@ -290,21 +290,21 @@ DialogPlus {
 							Layout.preferredWidth: parent.cellWidth; wrapMode: Text.WordWrap; color: NewConferenceStyle.titles.textColor.color; font.weight: NewConferenceStyle.titles.weight; font.pointSize: NewConferenceStyle.titles.pointSize }
 						TextField{id: dateField; Layout.preferredWidth: parent.cellWidth
 							color: NewConferenceStyle.fields.textColor.color; font.weight: NewConferenceStyle.fields.weight; font.pointSize: NewConferenceStyle.fields.pointSize
-							function getDate(){
+							function getDateString(){
 								return text
 							}
-							function setDate(date){
-								text = UtilsCpp.toDateString(date, 'yyyy/MM/dd')
+							function setDateString(dateString){
+								text = dateString
 							}
 							text: conferenceManager.conferenceInfoModel ? UtilsCpp.toDateString(conferenceManager.conferenceInfoModel.dateTime, 'yyyy/MM/dd') : ''
 							icon: 'drop_down_custom'
 							MouseArea{
 								anchors.fill: parent
 								onClicked: {
-									window.attachVirtualWindow(Utils.buildCommonDialogUri('DateTimeDialog'), {hideOldDates:true, showDatePicker:true, selectedDate: new Date(dateField.getDate())}
+									window.attachVirtualWindow(Utils.buildCommonDialogUri('DateTimeDialog'), {hideOldDates:true, showDatePicker:true, selectedDate: UtilsCpp.toDateModel(dateField.getDateString(), 'yyyy/MM/dd')}
 										, function (status) {
 											if(status){
-												dateField.setDate(status.selectedDate)
+												dateField.setDateString(status.selectedDate.toDateString('yyyy/MM/dd'))
 											}
 										}
 									)
diff --git a/linphone-app/ui/views/App/Main/Conferences.qml b/linphone-app/ui/views/App/Main/Conferences.qml
index 5ba44bf83..fd148f31e 100644
--- a/linphone-app/ui/views/App/Main/Conferences.qml
+++ b/linphone-app/ui/views/App/Main/Conferences.qml
@@ -141,7 +141,7 @@ Item{
 								horizontalAlignment: Text.AlignHCenter
 								verticalAlignment: Text.AlignVCenter
 								
-								text: UtilsCpp.toDateString(section)
+								text: section
 							}
 						}
 					}