diff --git a/src/GoldenCheetah.cpp b/src/GoldenCheetah.cpp
index f94424c34..56f6d96a9 100644
--- a/src/GoldenCheetah.cpp
+++ b/src/GoldenCheetah.cpp
@@ -87,6 +87,16 @@ void GcWindow::setRideItem(RideItem* x)
     emit rideItemChanged(_rideItem);
 }
 
+void GcWindow::setDateRange(DateRange dr)
+{
+    _dr = dr;
+}
+
+DateRange GcWindow::dateRange() const
+{
+    return _dr;
+}
+
 double GcWindow::widthFactor() const
 {
     return _widthFactor;
diff --git a/src/GoldenCheetah.h b/src/GoldenCheetah.h
index ad9c49f8e..f6e0c25be 100644
--- a/src/GoldenCheetah.h
+++ b/src/GoldenCheetah.h
@@ -18,6 +18,7 @@
 
 #ifndef _GC_GoldenCheetah_h
 #define _GC_GoldenCheetah_h
+#include "TimeUtils.h"
 
 #define G_OBJECT Q_PROPERTY(QString instanceName READ instanceName WRITE setInstanceName)
 #define setInstanceName(x) setProperty("instanceName", x)
@@ -42,6 +43,7 @@ class GcWindow;
 Q_DECLARE_METATYPE(QWidget*);
 Q_DECLARE_METATYPE(RideItem*);
 Q_DECLARE_METATYPE(GcWinID);
+Q_DECLARE_METATYPE(DateRange);
 
 
 class GcWindow : public QFrame
@@ -68,9 +70,12 @@ private:
     // informed by the layout manager
     Q_PROPERTY(RideItem* ride READ rideItem WRITE setRideItem NOTIFY rideItemChanged)
 
+    // all charts have a date range, they don't all implement it
+    Q_PROPERTY(DateRange dateRange READ dateRange WRITE setDateRange NOTIFY dateRangeChanged);
+
     // geometry factor
     Q_PROPERTY(double widthFactor READ widthFactor WRITE setWidthFactor NOTIFY widthFactorChanged USER true);
-    Q_PROPERTY(double heightFactor READ heightFactor WRITE setHeightFactor NOTIFY widthFactorChanged USER true);
+    Q_PROPERTY(double heightFactor READ heightFactor WRITE setHeightFactor NOTIFY heightFactorChanged USER true);
 
     // can be resized
     Q_PROPERTY(bool resizable READ resizable WRITE setResizable USER true);
@@ -82,6 +87,7 @@ private:
     QString _instanceName;
     RideItem *_rideItem;
     GcWinID _type;
+    DateRange _dr;
     double _widthFactor;
     double _heightFactor;
     bool _resizable;
@@ -104,6 +110,7 @@ signals:
     void rideItemChanged(RideItem*);
     void heightFactorChanged(double);
     void widthFactorChanged(double);
+    void dateRangeChanged(DateRange);
     void resizing(GcWindow*);
     void moving(GcWindow*);
     void resized(GcWindow*); // finished resizing
@@ -134,6 +141,9 @@ public:
     void setRideItem(RideItem *);
     RideItem *rideItem() const;
 
+    void setDateRange(DateRange);
+    DateRange dateRange() const;
+
     void setWidthFactor(double);
     double widthFactor() const;
 
diff --git a/src/TimeUtils.cpp b/src/TimeUtils.cpp
index a9dba1cfd..7590103de 100644
--- a/src/TimeUtils.cpp
+++ b/src/TimeUtils.cpp
@@ -97,3 +97,23 @@ QDateTime convertToLocalTime(QString timestamp)
     }
 }
 
+DateRange::DateRange(QDate from, QDate to) : QObject()
+{
+    this->from=from;
+    this->to=to;
+}
+
+DateRange::DateRange(const DateRange &other) : QObject()
+{
+    from=other.from;
+    to=other.to;
+}
+
+DateRange& DateRange::operator=(const DateRange &other)
+{
+    from=other.from;
+    to=other.to;
+    emit changed(from, to);
+
+    return *this;
+}
diff --git a/src/TimeUtils.h b/src/TimeUtils.h
index 46dd42117..7f6a061f7 100644
--- a/src/TimeUtils.h
+++ b/src/TimeUtils.h
@@ -18,9 +18,10 @@
 
 #ifndef _TimeUtils_h
 #define _TimeUtils_h
-#include "GoldenCheetah.h"
 
+#include <QObject>
 #include <QDateTime>
+#include <QDate>
 #include <QString>
 
 QString interval_to_str(double secs);  // output like 1h 2m 3s
@@ -31,5 +32,18 @@ QString time_to_string(double secs);   // output like 1:02:03
 */
 QDateTime convertToLocalTime(QString timestamp);
 
-#endif // _TimeUtils_h
+class DateRange : QObject
+{
+    Q_OBJECT
 
+    public:
+        DateRange(const DateRange& other);
+        DateRange(QDate from = QDate(), QDate to = QDate());
+        DateRange& operator=(const DateRange &);
+        QDate from, to;
+
+    signals:
+        void changed(QDate from, QDate to);
+};
+
+#endif // _TimeUtils_h