Forrest Stephen Black seeks to appeal the district court’s order accepting the rec *266 ommendation of the magistrate judge and dismissing his motion for resentencing. We dismiss the appeal for lack of jurisdiction because the notice of appeal was not timely filed.

When the United States or its officer or agency is a party, the notice of appeal must be filed no more than sixty days after the entry of the district court’s final judgment or order, Fed. R.App. P. 4(a)(1)(B), unless the district court extends the appeal period under Fed. R.App. P. 4(a)(5) or reopens the appeal period under Fed. R.App. P. 4(a)(6). This appeal period is “mandatory and jurisdictional.” Browder v. Director, Dep’t of Corr., 434 U.S. 257, 264, 98 S.Ct. 556, 54 L.Ed.2d 521 (1978) (quoting United States v. Robinson, 361 U.S. 220, 229, 80 S.Ct. 282, 4 L.Ed.2d 259 (1960)).

The district court’s order was entered on the docket on February 20, 2004. The notice of appeal was filed on May 4, 2004. * Because Black failed to file a timely notice of appeal or to obtain an extension or reopening of the appeal period, we deny a certificate of appealability and dismiss the appeal. We grant Black’s motion to amend his informal brief and deny his motion to place this case in abeyance as moot. Finally, we dispense with oral argument because the facts and legal contentions are adequately presented in the materials before the court and argument would not aid the decisional process.

DISMISSED