Make year range validation less strict by default.

Author: euromark

lib/Cake/Test/Case/Utility/ValidationTest.php

@@ -1462,10 +1462,11 @@ public function testDateY() {
 		$this->assertTrue(Validation::date('2008', array('y')));
 		$this->assertTrue(Validation::date('2013', array('y')));
 		$this->assertTrue(Validation::date('2104', array('y')));
+		$this->assertTrue(Validation::date('1899', array('y')));
 		$this->assertFalse(Validation::date('20009', array('y')));
 		$this->assertFalse(Validation::date(' 2012', array('y')));
 		$this->assertFalse(Validation::date('3000', array('y')));
-		$this->assertFalse(Validation::date('1899', array('y')));
+		$this->assertFalse(Validation::date('1799', array('y')));
 	}
 
 /**

lib/Cake/Utility/Validation.php

@@ -278,7 +278,9 @@ public static function custom($check, $regex = null) {
 
 /**
  * Date validation, determines if the string passed is a valid date.
- * keys that expect full month, day and year will validate leap years
+ * keys that expect full month, day and year will validate leap years.
+ *
+ * Years are valid from 1800 to 2999.
  *
  * ### Formats:
  *
@@ -304,7 +306,7 @@ public static function date($check, $format = 'ymd', $regex = null) {
 		}
 		$month = '(0[123456789]|10|11|12)';
 		$separator = '([- /.])';
-		$fourDigitYear = '(([1][9][0-9][0-9])|([2][0-9][0-9][0-9]))';
+		$fourDigitYear = '(([1][8-9][0-9][0-9])|([2][0-9][0-9][0-9]))';
 		$twoDigitYear = '([0-9]{2})';
 		$year = '(?:' . $fourDigitYear . '|' . $twoDigitYear . ')';