diff --git a/src/DateHandler/_DateParser.py b/src/DateHandler/_DateParser.py
index 5826a7244..62df0459c 100644
--- a/src/DateHandler/_DateParser.py
+++ b/src/DateHandler/_DateParser.py
@@ -89,6 +89,13 @@ def swedish_valid(date_tuple):
         valid = False 
     return valid
 
+def french_valid(date_tuple):
+    valid = True
+    # year 1 starts on 22.9.1792
+    if date_tuple[2] < 1:
+        valid = False       
+    return valid
+
 #-------------------------------------------------------------------------
 #
 # Parser class
@@ -354,7 +361,7 @@ class DateParser:
 
     def _parse_french(self, text):
         return self._parse_calendar(text, self._ftext, self._ftext2,
-                                    self.french_to_int)
+                                    self.french_to_int, french_valid)
 
     def _parse_greg_julian(self, text):
         return self._parse_calendar(text, self._text, self._text2,
@@ -428,6 +435,8 @@ class DateParser:
             check = gregorian_valid
         if subparser == self._parse_swedish:
             check = swedish_valid
+        if subparser == self._parse_french:
+            check = french_valid
         else:
             check = None
         
diff --git a/src/DateHandler/_Date_fr.py b/src/DateHandler/_Date_fr.py
index ee94d77c7..81512f3ff 100644
--- a/src/DateHandler/_Date_fr.py
+++ b/src/DateHandler/_Date_fr.py
@@ -167,7 +167,7 @@ class DateParserFR(DateParser):
         # This self._numeric is different from the base
         # avoid bug gregorian / french calendar conversion (+/-10 days)
         self._numeric  = re.compile("((\d+)[/\. ])?\s*((\d+)[/\.])?\s*(\d+)\s*$")
-        self._span     =  re.compile(u"(de)\s+(?P<start>.+)\s+(à)\s+(?P<stop>.+)", re.IGNORECASE)
+        self._span     = re.compile(u"(de)\s+(?P<start>.+)\s+(à)\s+(?P<stop>.+)", re.IGNORECASE)
         self._range    = re.compile(u"(entre|ent\.|ent)\s+(?P<start>.+)\s+(et)\s+(?P<stop>.+)", re.IGNORECASE)
     # This self._text are different from the base
         # by adding ".?" after the first date and removing "\s*$" at the end
@@ -186,6 +186,9 @@ class DateParserFR(DateParser):
     #islamic
         self._itext2 = re.compile('(\d+)?.?\s+?%s\s*((\d+)(/\d+)?)?' % self._imon_str, 
                                   re.IGNORECASE)
+    #swedish
+        self._stext2    = re.compile('(\d+)?.?\s+?%s\s*((\d+)(/\d+)?)?' % self._smon_str,
+                                    re.IGNORECASE)
         
 #-------------------------------------------------------------------------
 #
@@ -247,7 +250,7 @@ class DateDisplayFR(DateDisplay):
             else:
                 value = "%s %d, %s" % (self.MONS[date_val[1]], date_val[0], year)
         elif self.format == 4:
-            # Day Month Year
+            # Day. Month Year
             if date_val[0] == 0:
                 if date_val[1] == 0:
                     value = year
@@ -258,7 +261,7 @@ class DateDisplayFR(DateDisplay):
         # value = "%d %s %s" % (date_val[0], self._months[date_val[1]], year)
                 value = "%d. %s %s" % (date_val[0], self._months[date_val[1]], year)
         else:
-            # Day MON Year
+            # Day. MON Year
             if date_val[0] == 0:
                 if date_val[1] == 0:
                     value = year
@@ -273,23 +276,6 @@ class DateDisplayFR(DateDisplay):
         else:
             return value
             
-    def _display_french(self, date_val):
-        year = date_val[2]          
-        if date_val[0] == 0:
-            if date_val[1] == 0:
-                return year
-            else:
-                return u"%s %d" % (self.french[date_val[1]], year) 
-        # convertion mistake before 22.9.1792        
-        elif date_val[2] == 0 and date_val[1] == 13:
-            # from 17.9.1792 to 21.9.1792 : trap for Extra months, we cannot date back
-            return self._bce_str % year
-        # on 1792 before 22.9.1792, no negative years    
-        elif date_val[2] < 0: 
-            return self._bce_str % year
-        # valid dates on 1792        
-        else:
-            return u"%s %s %d" % (date_val[0], self.french[date_val[1]], year)       
 
     def display(self, date):
         """
diff --git a/src/gen/lib/calendar.py b/src/gen/lib/calendar.py
index 623901f0b..8dcb1d269 100644
--- a/src/gen/lib/calendar.py
+++ b/src/gen/lib/calendar.py
@@ -466,18 +466,27 @@ def gregorian_ymd(sdn):
 
 def french_sdn(year, month, day):
     """Convert a French Republican Calendar date to an SDN number."""
-    return (year*_FR_DAYS_PER_4_YEARS)/4 + \
+    sdn = (year*_FR_DAYS_PER_4_YEARS)/4 + \
            (month-1)*_FR_DAYS_PER_MONTH + \
            day + _FR_SDN_OFFSET
+    # do not convert dates before 22.9.1792 or after 1.1.1806
+    if sdn < 2375840 or sdn > 2380688 :
+        return gregorian_sdn(year, month, day)
+    else:
+        return sdn
 
 def french_ymd(sdn):
     """Convert an SDN number to a French Republican Calendar date."""
-    temp = (sdn-_FR_SDN_OFFSET)*4 - 1
-    year = temp/_FR_DAYS_PER_4_YEARS
-    day_of_year = (temp%_FR_DAYS_PER_4_YEARS)/4
-    month = (day_of_year/_FR_DAYS_PER_MONTH)+1
-    day = (day_of_year%_FR_DAYS_PER_MONTH)+1
-    return (year, month, day)
+    # only between 22.9.1792 and 1.1.1806
+    if sdn >= 2375840 and sdn <= 2380688:
+        temp = (sdn-_FR_SDN_OFFSET)*4 - 1
+        year = temp/_FR_DAYS_PER_4_YEARS
+        day_of_year = (temp%_FR_DAYS_PER_4_YEARS)/4
+        month = (day_of_year/_FR_DAYS_PER_MONTH)+1
+        day = (day_of_year%_FR_DAYS_PER_MONTH)+1
+        return (year, month, day)
+    else:
+        return gregorian_ymd(sdn)
 
 def persian_sdn(year, month, day):
     """Convert a Persian date to an SDN number."""