Allow date-only ISO strings to have no time zone. FasterXML#816

src/main/java/com/fasterxml/jackson/databind/util/ISO8601Utils.java

@@ -152,6 +152,15 @@ public static Date parse(String date, ParsePosition pos) throws ParseException {
             int minutes = 0;
             int seconds = 0;
             int milliseconds = 0; // always use 0 otherwise returned date will include millis of current time
+
+            // if the value has no time component (and no time zone), we are done
+            if (!checkOffset(date, offset, 'T') && (date.length() <= offset)) {
+                Calendar calendar = new GregorianCalendar(year, month - 1, day);
+
+                pos.setIndex(offset);
+                return calendar.getTime();
+            }
+
             if (checkOffset(date, offset, 'T')) {
 
                 // extract hours, minutes, seconds and milliseconds

src/test/java/com/fasterxml/jackson/databind/util/ISO8601DateFormatTest.java

@@ -5,7 +5,6 @@
 
 
 import com.fasterxml.jackson.databind.BaseMapTest;
-import com.fasterxml.jackson.databind.util.ISO8601DateFormat;
 
 /**
  * @see ISO8601DateFormat
@@ -33,6 +32,16 @@ public void testFormat() {
     public void testParse() throws Exception {
         Date result = df.parse("2007-08-13T19:51:23Z");
         assertEquals(date, result);
+
+        // Test parsing date-only values with and without a timezone designation
+        Date dateOnly = df.parse("2007-08-14");
+        Calendar cal = new GregorianCalendar(2007, 8-1, 14);
+        assertEquals(cal.getTime(), dateOnly);
+
+        dateOnly = df.parse("2007-08-14Z");
+        cal = new GregorianCalendar(2007, 8-1, 14);
+        cal.setTimeZone(TimeZone.getTimeZone("GMT"));
+        assertEquals(cal.getTime(), dateOnly);
     }
 
     public void testPartialParse() throws Exception {