diff --git a/data/grampsxml.dtd b/data/grampsxml.dtd
index df8141ef8..b55ef1350 100644
--- a/data/grampsxml.dtd
+++ b/data/grampsxml.dtd
@@ -379,26 +379,32 @@ SHARED ELEMENTS
 -->
 <!ELEMENT daterange    EMPTY>
 <!ATTLIST daterange
-        start   CDATA #REQUIRED
-        stop    CDATA #REQUIRED
-        quality (estimated|calculated) #IMPLIED
-        cformat CDATA #IMPLIED
+        start     CDATA                  #REQUIRED
+        stop      CDATA                  #REQUIRED
+        quality   (estimated|calculated) #IMPLIED
+        cformat   CDATA                  #IMPLIED
+        dualdated (0|1)                  #IMPLIED
+        newyear   CDATA                  #IMPLIED 
 >
 
 <!ELEMENT datespan    EMPTY>
 <!ATTLIST datespan
-        start   CDATA #REQUIRED
-        stop    CDATA #REQUIRED
-        quality (estimated|calculated) #IMPLIED
-        cformat CDATA #IMPLIED
+        start   CDATA                    #REQUIRED
+        stop    CDATA                    #REQUIRED
+        quality (estimated|calculated)   #IMPLIED
+        cformat CDATA                    #IMPLIED
+        dualdated (0|1)                  #IMPLIED
+        newyear   CDATA                  #IMPLIED 
 >
 
 <!ELEMENT dateval    EMPTY>
 <!ATTLIST dateval
-        val     CDATA                  #REQUIRED
-        type    (before|after|about)   #IMPLIED
-        quality (estimated|calculated) #IMPLIED
-        cformat CDATA                  #IMPLIED
+        val       CDATA                  #REQUIRED
+        type      (before|after|about)   #IMPLIED
+        quality   (estimated|calculated) #IMPLIED
+        cformat   CDATA                  #IMPLIED
+        dualdated (0|1)                  #IMPLIED
+        newyear   CDATA                  #IMPLIED 
 >
 
 <!ELEMENT datestr    EMPTY>
diff --git a/src/plugins/ExportXml.py b/src/plugins/ExportXml.py
index d313d486d..319e51562 100644
--- a/src/plugins/ExportXml.py
+++ b/src/plugins/ExportXml.py
@@ -822,8 +822,9 @@ class GrampsDbXmlWriter(UpdateCallback):
             d1 = self.get_iso_date(date.get_start_date())
             d2 = self.get_iso_date(date.get_stop_date())
             if d1 != "" or d2 != "":
-                self.g.write('%s<%s start="%s" stop="%s"%s%s/>\n'
-                             % (sp,tagname,d1,d2,qual_str,calstr))
+                self.g.write('%s<%s start="%s" stop="%s"%s%s%s%s/>\n'
+                             % (sp,tagname,d1,d2,qual_str,calstr,
+                                dualdated_str, newyear_str))
         elif mode != gen.lib.Date.MOD_TEXTONLY:
             date_str = self.get_iso_date(date.get_start_date())
             if date_str == "":
diff --git a/src/plugins/ImportXml.py b/src/plugins/ImportXml.py
index ff698903a..c0a6d3406 100644
--- a/src/plugins/ImportXml.py
+++ b/src/plugins/ImportXml.py
@@ -1752,9 +1752,20 @@ class GrampsParser(UpdateCallback):
         else:
             qual = gen.lib.Date.QUAL_NONE
         
+        dualdated = False
+        if 'dualdated' in attrs:
+            val = attrs['dualdated']
+            if val == "1":
+                dualdated = True
+
+        newyear = gen.lib.Date.NEWYEAR_JAN1
+        if 'newyear' in attrs:
+            newyear = int(attrs['newyear'])
+
         date_value.set(qual, mode, cal, 
-                       (day, month, year, False, rng_day, 
-                        rng_month, rng_year, False))
+                       (day, month, year, dualdated, 
+                        rng_day, rng_month, rng_year, dualdated), 
+                       newyear=newyear)
 
     def start_dateval(self, attrs):
         if self.source_ref: