diff --git a/schema/json/metaschema-datatypes.json b/schema/json/metaschema-datatypes.json
index 180f86333..b93a29199 100644
--- a/schema/json/metaschema-datatypes.json
+++ b/schema/json/metaschema-datatypes.json
@@ -22,12 +22,12 @@
     },
     "DateTimeDatatype": {
       "type": "string",
-      "pattern": "^(((2000|2400|2800|(19|2[0-9](0[48]|[2468][048]|[13579][26])))-02-29)|(((19|2[0-9])[0-9]{2})-02-(0[1-9]|1[0-9]|2[0-8]))|(((19|2[0-9])[0-9]{2})-(0[13578]|10|12)-(0[1-9]|[12][0-9]|3[01]))|(((19|2[0-9])[0-9]{2})-(0[469]|11)-(0[1-9]|[12][0-9]|30)))T(2[0-3]|[01][0-9]):([0-5][0-9]):([0-5][0-9])(\\.[0-9]+)?(Z|[+-][0-9]{2}:[0-9]{2})?$"
+      "pattern": "^(((2000|2400|2800|(19|2[0-9](0[48]|[2468][048]|[13579][26])))-02-29)|(((19|2[0-9])[0-9]{2})-02-(0[1-9]|1[0-9]|2[0-8]))|(((19|2[0-9])[0-9]{2})-(0[13578]|10|12)-(0[1-9]|[12][0-9]|3[01]))|(((19|2[0-9])[0-9]{2})-(0[469]|11)-(0[1-9]|[12][0-9]|30)))T(2[0-3]|[01][0-9]):([0-5][0-9]):([0-5][0-9])(\\.[0-9]*[1-9])?(Z|(-((0[0-9]|1[0-2]):00|0[39]:30)|\\+((0[0-9]|1[0-4]):00|(0[34569]|10):30|(0[58]|12):45)))?$"
     },
     "DateTimeWithTimezoneDatatype": {
       "type": "string",
       "format": "date-time",
-      "pattern": "^(((2000|2400|2800|(19|2[0-9](0[48]|[2468][048]|[13579][26])))-02-29)|(((19|2[0-9])[0-9]{2})-02-(0[1-9]|1[0-9]|2[0-8]))|(((19|2[0-9])[0-9]{2})-(0[13578]|10|12)-(0[1-9]|[12][0-9]|3[01]))|(((19|2[0-9])[0-9]{2})-(0[469]|11)-(0[1-9]|[12][0-9]|30)))T(2[0-3]|[01][0-9]):([0-5][0-9]):([0-5][0-9])(\\.[0-9]+)?(Z|[+-][0-9]{2}:[0-9]{2})$"
+      "pattern": "^(((2000|2400|2800|(19|2[0-9](0[48]|[2468][048]|[13579][26])))-02-29)|(((19|2[0-9])[0-9]{2})-02-(0[1-9]|1[0-9]|2[0-8]))|(((19|2[0-9])[0-9]{2})-(0[13578]|10|12)-(0[1-9]|[12][0-9]|3[01]))|(((19|2[0-9])[0-9]{2})-(0[469]|11)-(0[1-9]|[12][0-9]|30)))T(2[0-3]|[01][0-9]):([0-5][0-9]):([0-5][0-9])(\\.[0-9]*[1-9])?(Z|(-((0[0-9]|1[0-2]):00|0[39]:30)|\\+((0[0-9]|1[0-4]):00|(0[34569]|10):30|(0[58]|12):45)))$"
     },
     "DayTimeDurationDatatype": {
       "type": "string",
diff --git a/schema/xml/metaschema-datatypes.xsd b/schema/xml/metaschema-datatypes.xsd
index a1f8e099a..59a52e627 100644
--- a/schema/xml/metaschema-datatypes.xsd
+++ b/schema/xml/metaschema-datatypes.xsd
@@ -41,7 +41,7 @@
 	
 	<xs:simpleType name="DateTimeDatatype">
 		<xs:restriction base="xs:dateTime">
-			<xs:pattern value="(((2000|2400|2800|(19|2[0-9](0[48]|[2468][048]|[13579][26])))-02-29)|(((19|2[0-9])[0-9]{2})-02-(0[1-9]|1[0-9]|2[0-8]))|(((19|2[0-9])[0-9]{2})-(0[13578]|10|12)-(0[1-9]|[12][0-9]|3[01]))|(((19|2[0-9])[0-9]{2})-(0[469]|11)-(0[1-9]|[12][0-9]|30)))T((2[0-3]|[01][0-9]):([0-5][0-9]):([0-5][0-9])(\.[0-9]+)?)(Z|[+-][0-9]{2}:[0-9]{2})?"/>
+			<xs:pattern value="(((2000|2400|2800|(19|2[0-9](0[48]|[2468][048]|[13579][26])))-02-29)|(((19|2[0-9])[0-9]{2})-02-(0[1-9]|1[0-9]|2[0-8]))|(((19|2[0-9])[0-9]{2})-(0[13578]|10|12)-(0[1-9]|[12][0-9]|3[01]))|(((19|2[0-9])[0-9]{2})-(0[469]|11)-(0[1-9]|[12][0-9]|30)))T(2[0-3]|[01][0-9]):([0-5][0-9]):([0-5][0-9])(\.[0-9]*[1-9])?(Z|(-((0[0-9]|1[0-2]):00|0[39]:30)|\+((0[0-9]|1[0-4]):00|(0[34569]|10):30|(0[58]|12):45)))?"/>
 		</xs:restriction>
 	</xs:simpleType>
 	
@@ -50,7 +50,7 @@
 			<xs:documentation>The xs:dateTime with a required timezone.</xs:documentation>
 		</xs:annotation>
 		<xs:restriction base="DateTimeDatatype">
-			<xs:pattern value="(((2000|2400|2800|(19|2[0-9](0[48]|[2468][048]|[13579][26])))-02-29)|(((19|2[0-9])[0-9]{2})-02-(0[1-9]|1[0-9]|2[0-8]))|(((19|2[0-9])[0-9]{2})-(0[13578]|10|12)-(0[1-9]|[12][0-9]|3[01]))|(((19|2[0-9])[0-9]{2})-(0[469]|11)-(0[1-9]|[12][0-9]|30)))T((2[0-3]|[01][0-9]):([0-5][0-9]):([0-5][0-9])(\.[0-9]+)?)(Z|[+-][0-9]{2}:[0-9]{2})"/>
+			<xs:pattern value="(((2000|2400|2800|(19|2[0-9](0[48]|[2468][048]|[13579][26])))-02-29)|(((19|2[0-9])[0-9]{2})-02-(0[1-9]|1[0-9]|2[0-8]))|(((19|2[0-9])[0-9]{2})-(0[13578]|10|12)-(0[1-9]|[12][0-9]|3[01]))|(((19|2[0-9])[0-9]{2})-(0[469]|11)-(0[1-9]|[12][0-9]|30)))T(2[0-3]|[01][0-9]):([0-5][0-9]):([0-5][0-9])(\.[0-9]*[1-9])?(Z|(-((0[0-9]|1[0-2]):00|0[39]:30)|\+((0[0-9]|1[0-4]):00|(0[34569]|10):30|(0[58]|12):45)))"/>
 		</xs:restriction>
 	</xs:simpleType>