This certificate recites that it was sworn to "this 27 day of July, 1953" [ sic]. From this, the claimant would argue that, obviously, the rider could not have been before the court three days earlier on July 24, and, therefore when the order was signed the only medical certificate that was before the court was the one of June 19, thus, the statute was not complied with. It is clear, however, that the rider was produced before the court on July 24, 1953, because it contains thereon the initials of the Justice presiding thereat and that it was one of the papers upon which he acted in granting the order. The mere omission to insert the proper day in the jurat is a "mere formal error of a kind which will, as a rule, be disregarded" ( Griffin v. Barton, 20 App. Div. 512, 513). The order accompanied the claimant to the hospital and the authorities there were right in receiving and detaining him pursuant thereto because, upon its face, it appeared that the statute had been complied with.