diff --git a/rdflib/extras/gregorian_type.py b/rdflib/extras/gregorian_type.py
new file mode 100644
index 000000000..4f0031541
--- /dev/null
+++ b/rdflib/extras/gregorian_type.py
@@ -0,0 +1,14 @@
+class GregorianType:
+    def __init__(self, lexical_value : str, datatype : int):
+        self.lexical_value = lexical_value
+        lvalue = lexical_value.split('-')
+        self.gYear = lvalue[0]
+        self.gMonth = None
+        if datatype == 2:
+            self.gMonth = lvalue[1]
+
+    def __str__(self):
+        if self.gMonth == None:
+            return self.gYear
+        return self.gYear + '-' + self.gMonth
+
diff --git a/rdflib/term.py b/rdflib/term.py
index a93e9c50f..40fc26f8f 100644
--- a/rdflib/term.py
+++ b/rdflib/term.py
@@ -26,6 +26,7 @@
 
 # from __future__ import unicode_literals
 from fractions import Fraction
+from rdflib.extras.gregorian_type import GregorianType
 
 __all__ = [
     "bind",
@@ -76,7 +77,6 @@
 
 _invalid_uri_chars = '<>" {}|\\^`'
 
-
 def _is_valid_uri(uri):
     return all(map(lambda c: ord(c) > 256 or c not in _invalid_uri_chars, uri))
 
@@ -543,7 +543,13 @@ def __new__(cls, lexical_or_value, lang=None, datatype=None, normalize=None):
             datatype = URIRef(datatype)
 
         value = None
-        if isinstance(lexical_or_value, Literal):
+        if datatype == URIRef(_XSD_GYEAR) or datatype == URIRef(_XSD_GYEARMONTH):
+            if datatype == URIRef(_XSD_GYEAR):
+                value = GregorianType(lexical_or_value, 1)
+            else:
+                value = GregorianType(lexical_or_value, 2)
+
+        elif isinstance(lexical_or_value, Literal):
             # create from another Literal instance
 
             lang = lang or lexical_or_value.language
@@ -558,7 +564,6 @@ def __new__(cls, lexical_or_value, lang=None, datatype=None, normalize=None):
             # passed a string
             # try parsing lexical form of datatyped literal
             value = _castLexicalToPython(lexical_or_value, datatype)
-
             if value is not None and normalize:
                 _value, _datatype = _castPythonToLiteral(value, datatype)
                 if _value is not None and _is_valid_unicode(_value):
@@ -1439,6 +1444,9 @@ def _parseBoolean(value):
 _OWL_RATIONAL = URIRef("http://www.w3.org/2002/07/owl#rational")
 _XSD_HEXBINARY = URIRef(_XSD_PFX + "hexBinary")
 # TODO: gYearMonth, gYear, gMonthDay, gDay, gMonth
+_XSD_GYEAR = URIRef(_XSD_PFX + 'gYear')
+_XSD_GYEARMONTH = URIRef(_XSD_PFX + 'gYearMonth')
+
 
 _NUMERIC_LITERAL_TYPES = (
     _XSD_INTEGER,
@@ -1565,40 +1573,38 @@ def _castPythonToLiteral(obj, datatype):
 
 XSDToPython = {
     None: None,  # plain literals map directly to value space
-    URIRef(_XSD_PFX + "time"): parse_time,
-    URIRef(_XSD_PFX + "date"): parse_date,
-    URIRef(_XSD_PFX + "gYear"): parse_date,
-    URIRef(_XSD_PFX + "gYearMonth"): parse_date,
-    URIRef(_XSD_PFX + "dateTime"): parse_datetime,
-    URIRef(_XSD_PFX + "duration"): parse_duration,
-    URIRef(_XSD_PFX + "dayTimeDuration"): parse_duration,
-    URIRef(_XSD_PFX + "yearMonthDuration"): parse_duration,
-    URIRef(_XSD_PFX + "hexBinary"): _unhexlify,
-    URIRef(_XSD_PFX + "string"): None,
-    URIRef(_XSD_PFX + "normalizedString"): None,
-    URIRef(_XSD_PFX + "token"): None,
-    URIRef(_XSD_PFX + "language"): None,
-    URIRef(_XSD_PFX + "boolean"): _parseBoolean,
-    URIRef(_XSD_PFX + "decimal"): Decimal,
-    URIRef(_XSD_PFX + "integer"): long_type,
-    URIRef(_XSD_PFX + "nonPositiveInteger"): int,
-    URIRef(_XSD_PFX + "long"): long_type,
-    URIRef(_XSD_PFX + "nonNegativeInteger"): int,
-    URIRef(_XSD_PFX + "negativeInteger"): int,
-    URIRef(_XSD_PFX + "int"): long_type,
-    URIRef(_XSD_PFX + "unsignedLong"): long_type,
-    URIRef(_XSD_PFX + "positiveInteger"): int,
-    URIRef(_XSD_PFX + "short"): int,
-    URIRef(_XSD_PFX + "unsignedInt"): long_type,
-    URIRef(_XSD_PFX + "byte"): int,
-    URIRef(_XSD_PFX + "unsignedShort"): int,
-    URIRef(_XSD_PFX + "unsignedByte"): int,
-    URIRef(_XSD_PFX + "float"): float,
-    URIRef(_XSD_PFX + "double"): float,
-    URIRef(_XSD_PFX + "base64Binary"): lambda s: base64.b64decode(s),
-    URIRef(_XSD_PFX + "anyURI"): None,
+    URIRef(_XSD_PFX + 'time'): parse_time,
+    URIRef(_XSD_PFX + 'date'): parse_date,
+    URIRef(_XSD_PFX + 'dateTime'): parse_datetime,
+    URIRef(_XSD_PFX + 'duration'): parse_duration,
+    URIRef(_XSD_PFX + 'dayTimeDuration'): parse_duration,
+    URIRef(_XSD_PFX + 'yearMonthDuration'): parse_duration,
+    URIRef(_XSD_PFX + 'hexBinary'): _unhexlify,
+    URIRef(_XSD_PFX + 'string'): None,
+    URIRef(_XSD_PFX + 'normalizedString'): None,
+    URIRef(_XSD_PFX + 'token'): None,
+    URIRef(_XSD_PFX + 'language'): None,
+    URIRef(_XSD_PFX + 'boolean'): lambda i: i.lower() == 'true' or (i.isdigit() and int(i) == True),
+    URIRef(_XSD_PFX + 'decimal'): Decimal,
+    URIRef(_XSD_PFX + 'integer'): long_type,
+    URIRef(_XSD_PFX + 'nonPositiveInteger'): int,
+    URIRef(_XSD_PFX + 'long'): long_type,
+    URIRef(_XSD_PFX + 'nonNegativeInteger'): int,
+    URIRef(_XSD_PFX + 'negativeInteger'): int,
+    URIRef(_XSD_PFX + 'int'): long_type,
+    URIRef(_XSD_PFX + 'unsignedLong'): long_type,
+    URIRef(_XSD_PFX + 'positiveInteger'): int,
+    URIRef(_XSD_PFX + 'short'): int,
+    URIRef(_XSD_PFX + 'unsignedInt'): long_type,
+    URIRef(_XSD_PFX + 'byte'): int,
+    URIRef(_XSD_PFX + 'unsignedShort'): int,
+    URIRef(_XSD_PFX + 'unsignedByte'): int,
+    URIRef(_XSD_PFX + 'float'): float,
+    URIRef(_XSD_PFX + 'double'): float,
+    URIRef(_XSD_PFX + 'base64Binary'): lambda s: base64.b64decode(s),
+    URIRef(_XSD_PFX + 'anyURI'): None,
     _RDF_XMLLITERAL: _parseXML,
-    _RDF_HTMLLITERAL: _parseHTML,
+    _RDF_HTMLLITERAL: _parseHTML
 }
 
 _toPythonMapping = {}
@@ -1804,5 +1810,4 @@ def recurse():
 
 if __name__ == "__main__":
     import doctest
-
     doctest.testmod()