Is Sakura older than syaoran?

Is Sakura older than syaoran?

Going by this, Syaoran would be around the same age, plus a bit older (due to his birthday being July 13, while Sakura's is April 1st. In Japan, the Japanese school system begins in April and ends in March; thus, Syaoran would age before Sakura does, as Sakura wouldn't age until the next April 1.)