diff --git a/.jshintrc b/.jshintrc
index bce0e3a..aa97aba 100644
--- a/.jshintrc
+++ b/.jshintrc
@@ -16,6 +16,7 @@
 	"unused": "vars",
 	"laxbreak": true,
 	"laxcomma": false,
+	"loopfunc": true,
 	"onevar": false,
 	"bitwise": false,
 	"forin": false,
diff --git a/src/values/TimeValue.js b/src/values/TimeValue.js
index 7e53967..1484962 100644
--- a/src/values/TimeValue.js
+++ b/src/values/TimeValue.js
@@ -29,17 +29,17 @@ var SELF = dv.TimeValue = util.inherit( 'DvTimeValue', PARENT, function( timesta
 	this._time = {};
 
 	try {
-		var matches = /^([-+]?\d+)-(\d+)-(\d+)T(\d{2}):(\d{2}):(\d{2})Z$/.exec( timestamp );
+		var matches = /^([-+]?\d+)-(\d+)-(\d+)T(?:(\d+):(\d+)(?::(\d+))?Z?)?$/.exec( timestamp );
 
 		// Strip additional leading zeros from the year, but keep 4 digits.
 		this._time.year = matches[1].replace( /\b0+(?=\d{4})/, '' );
 		this._time.month = parseInt( matches[2], 10 );
 		this._time.day = parseInt( matches[3], 10 );
-		this._time.hour = parseInt( matches[4], 10 );
-		this._time.minute = parseInt( matches[5], 10 );
-		this._time.second = parseInt( matches[6], 10 );
+		this._time.hour = parseInt( matches[4] || 0, 10 );
+		this._time.minute = parseInt( matches[5] || 0, 10 );
+		this._time.second = parseInt( matches[6] || 0, 10 );
 	} catch( e ) {
-		throw new Error( 'Unable to process supposed timestamp string' );
+		throw new Error( 'Unable to process timestamp "' + timestamp + '"' );
 	}
 
 	this._options = {
diff --git a/tests/src/values/TimeValue.tests.js b/tests/src/values/TimeValue.tests.js
index 7545c8a..bffb19a 100644
--- a/tests/src/values/TimeValue.tests.js
+++ b/tests/src/values/TimeValue.tests.js
@@ -36,6 +36,19 @@ define( [
 		getConstructorArguments: function() {
 			return [
 				['+0000000000001942-04-01T00:00:00Z'],
+
+				// Optional parts
+				['+0000000000001942-04-01T00:00:00'],
+				['+0000000000001942-04-01T00:00'],
+				['+0000000000001942-04-01T'],
+				['0000000000001942-04-01T'],
+				['1942-04-01T'],
+
+				// Minimal and maximal length
+				['+1-1-1T1:1:1Z'],
+				['+9999999999999999-12-31T23:59:59Z'],
+
+				// Options
 				['+0000000000001400-01-01T00:00:00Z', {
 					calendarModel: 'http://www.wikidata.org/entity/Q1985786'
 				} ],
@@ -45,6 +58,46 @@ define( [
 			];
 		},
 
+		/**
+		 * Tests if the constructor fails as expected for invalid and unsupported timestamp values.
+		 *
+		 * @since 0.7
+		 *
+		 * @param {QUnit} assert
+		 */
+		testConstructorThrowsException: function( assert ) {
+			var invalidTimestamps = [
+				// Non-strings
+				undefined,
+				null,
+				1,
+				0.1,
+
+				// The "T" is required
+				'',
+				'1',
+				'1942-04-01',
+				'+0000000000002015-01-01 01:01:01Z',
+
+				// Unsupported time zones
+				'+0000000000002015-01-01T01:01:01A',
+				'+0000000000002015-01-01T01:01:01+0000',
+				'+0000000000002015-01-01T01:01:01+00:00'
+			];
+			var i, invalidTimestamp;
+
+			for ( i = 0; i < invalidTimestamps.length; i++ ) {
+				invalidTimestamp = invalidTimestamps[i];
+
+				assert.throws(
+					function() {
+						dv.TimeValue( invalidTimestamp );
+					},
+					'"' + invalidTimestamp + '" is not a valid TimeValue timestamp'
+				);
+			}
+		},
+
 		/**
 		 * Tests if the equals method is able to return false.
 		 *