Plaintiff appeals from a judgment in favor of defendants. The parties have raised no question about the timeliness of the appeal, but we are required to determine our jurisdiction. Timely filing of an appeal is jurisdictional. K.W. v. Missouri Division of Family Services, 694 S.W.2d 915 (Mo.App. 1985) [2, 3].

Verdict in this case was returned February 24, 1988. Motion for new trial was filed March 9, and denied on April 29. Notice of appeal was filed on May 13. Upon the denial of the motion for new trial, the judgment became final for purposes of appeal. Rule 81.05(a). Plaintiff had ten days thereafter to file his notice of appeal. Rule 81.04(a). That ten-day period did not exclude weekends. Rule 44.01(a). Ten days after April 29 was May 9, a holiday. Notice of appeal was due May 10. The notice of appeal was untimely and we lack jurisdiction over the appeal.

Appeal dismissed.