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diff --git a/chart2/source/view/inc/DateHelper.hxx b/chart2/source/view/inc/DateHelper.hxx
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+++ b/chart2/source/view/inc/DateHelper.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+#ifndef _CHART2_DATEHELPER_HXX
+#define _CHART2_DATEHELPER_HXX
+
+#include <com/sun/star/chart2/XScaling.hpp>
+#include <tools/date.hxx>
+
+//.............................................................................
+namespace chart
+{
+//.............................................................................
+
+//-----------------------------------------------------------------------------
+/**
+*/
+
+class DateHelper
+{
+public:
+    static bool IsInSameYear( const Date& rD1, const Date& rD2 );
+    static bool IsInSameMonth( const Date& rD1, const Date& rD2 );
+
+    static long GetMonthsBetweenDates( Date aD1, Date aD2 );
+    static Date GetDateSomeMonthsAway( const Date& rD, long nMonthDistance );
+    static Date GetDateSomeYearsAway( const Date& rD, long nYearDistance );
+    static bool IsLessThanOneMonthAway( const Date& rD1, const Date& rD2 );
+    static bool IsLessThanOneYearAway( const Date& rD1, const Date& rD2 );
+
+    static double RasterizeDateValue( double fValue, const Date& rNullDate, long TimeResolution );
+};
+
+//.............................................................................
+} //namespace chart
+//.............................................................................
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */