Julian/Gregorian calendar issue when entering only year as date

when running gramps in Norwegian

Fixes #10687

gramps/gen/datehandler/_date_nb.py

@@ -58,6 +58,7 @@ class DateParserNb(DateParser):
         'innen'  : Date.MOD_BEFORE,
         'etter'   : Date.MOD_AFTER,
         'omkring' : Date.MOD_ABOUT,
+        'omtrent' : Date.MOD_ABOUT,
         'ca'      : Date.MOD_ABOUT
         }
 
@@ -89,8 +90,8 @@ class DateParserNb(DateParser):
 
     def init_strings(self):
         DateParser.init_strings(self)
-        # match day. month year
-        self._numeric = re.compile(r"((\d+)[\.])?\s*((\d+))?\s*(\d+)$")
+        self._numeric = re.compile(
+            r"((\d+)[/\.\s]\s*)?((\d+)[/\.\-\s]\s*)?(\d+)\s*$")
         self._span = re.compile(
             r"(fra)?\s*(?P<start>.+)\s*(til|--|–)\s*(?P<stop>.+)",
             re.IGNORECASE)
@@ -174,6 +175,10 @@ class DateDisplayNb(DateDisplay):
             return "%s%s%s%s" % (qual_str, self._mod_str[mod],
                                  text, scal)
 
+    def dd_dformat01(self, date_val):
+        """ numerical -- for Norwegian dates """
+        return DateDisplay.dd_dformat01(self, date_val).lstrip()
+
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