diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook.cs
index af14128..cf57850 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook.cs
@@ -634,5 +634,17 @@
         {
             Worksheets.ForEach(w => w.Dispose());
         }
+
+        public Boolean Use1904DateSystem { get; set; }
+        public XLWorkbook SetUse1904DateSystem()
+        {
+            return SetUse1904DateSystem(true);
+        }
+
+        public XLWorkbook SetUse1904DateSystem(Boolean value)
+        {
+            Use1904DateSystem = value;
+            return this;
+        }
     }
 }
\ No newline at end of file
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Load.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Load.cs
index 5e13eba..d2c89a4 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Load.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Load.cs
@@ -83,6 +83,8 @@
                         CustomProperties.Add(name, m.VTBool.Text == "true");
                 }
             }
+            var date1904 = dSpreadsheet.WorkbookPart.Workbook.WorkbookProperties.Date1904;
+            Use1904DateSystem = date1904 != null && date1904.Value;
 
             var referenceMode = dSpreadsheet.WorkbookPart.Workbook.CalculationProperties.ReferenceMode;
             if (referenceMode != null)
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs
index 75bf762..b7e07b3 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs
@@ -430,6 +430,9 @@
             if (workbook.WorkbookProperties.CodeName == null)
                 workbook.WorkbookProperties.CodeName = "ThisWorkbook";
 
+            if (Use1904DateSystem)
+                workbook.WorkbookProperties.Date1904 = true;
+
             #endregion
 
             if (workbook.BookViews == null)