書初め

php 
<?php
$dt = new DateTime("2014-12-27");
$aDay = DateInterval::createFromDateString("1 day");

for ($i = 0; $i < 7; $i++) {
    echo $dt->format("Y-m-d, o W D"), PHP_EOL;
    $dt->add($aDay);
}

$ php year.php
2014-12-27, 2014 52 Sat
2014-12-28, 2014 52 Sun
2014-12-29, 2015 01 Mon
2014-12-30, 2015 01 Tue
2014-12-31, 2015 01 Wed
2015-01-01, 2015 01 Thu
2015-01-02, 2015 01 Fri

Rebuild: 73: It Is 2015 Already (N, naan)