Description:
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date_parse function returns wrong value in year index in returned array when  parameter is '00.00.0000 - 00:00:00'

Reproduce code:
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$date_string = '00.00.0000 - 00:00:00';
print_r(date_parse($date_string));

Expected result:
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Array ( [year] => 0000 [month] => 0 [day] => 0 [hour] => 0 [minute] => 0 [second] => 0 [fraction] => 0 [warning_count] => 0 [warnings] => Array ( ) [error_count] => 1 [errors] => Array ( [11] => Unexpected character ) [is_localtime] => )

Actual result:
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Array ( [year] => 2000 [month] => 0 [day] => 0 [hour] => 0 [minute] => 0 [second] => 0 [fraction] => 0 [warning_count] => 0 [warnings] => Array ( ) [error_count] => 1 [errors] => Array ( [11] => Unexpected character ) [is_localtime] => )