Two points: 1) He can't feel too strongly about keeping his DOB private since he's mentioned it publicly numerous times, here's one example. 2) Mr. Wales has never asked for his DOB to be suppressed, if he ever does then we should respect his wishes. He has challenged the credibility of some of the sources used to verify his birthdate but I don't think those concerns extend to the Encyclopedia Britannica. Once the full protection is removed Mr. Wales' full DOB should be restored unless he explicitly asks for it to be removed.