53 Pa. Stat. § 7439
Whenever, heretofore, any land has been sold by the county treasurer of any county for the purpose of securing the payment of delinquent taxes which were assessed and levied against such land, and such sale was held contrary to the provisions of any act of Assembly requiring the adjournment or readjournment of such sale to a later date, such sale shall not be invalidated by reason of the failure of the county treasurer to adjourn or readjourn such sale as required by said act of Assembly, if in all other respects the laws relating to the holding of such sale were fully complied with, and all such treasurers sales are hereby ratified, confirmed and validated and the title to any such land purchased by any person or by the county commissioners of any county at such treasurers sale and the deed executed and acknowledge to such purchaser is hereby declared to be as valid as if such sale had been held in full conformity of the law relating thereto.
53 P.S. § 7439