In No. 05-6953, Vincent Byrd seeks to appeal the district court’s order denying his motion for reconsideration of the denial of his motion for reduction of sentence pursuant to Fed.R.Crim.P. 35. The appeal period for challenging post-judgment orders in criminal cases is ten days. See Fed. R.App. P. 4(b); United States v. Little, 392 F.3d 671, 680-81 (4th Cir.2004). The 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). The district court’s order denying reconsideration of the denial of Byrd’s Rule 35 motion was entered on May 4, 2005. Excluding weekends and holidays, the appeal period expired on May 18, 2005. Giving Byrd the benefit of the prisoner mailbox rale, Fed. R.App. P. 4(c), his notice of appeal is deemed filed when he gave it to prison officials for mailing on May 23, 2005. Thus, Byrd’s notice of appeal in No. 05-6953 was untimely, and we dismiss for lack of jurisdiction.
In No. 05-6954, Byrd seeks to appeal the district court’s orders denying relief on his motion filed under 28 U.S.C. § 2255 (2000). An appeal may not be taken from the final order in a § 2255 proceeding unless a circuit justice or judge issues a certificate of appealability. 28 U.S.C. § 2253(c)(1) (2000). A certificate of appealability will not issue absent “a substantial showing of the denial of a constitutional right.” 28 U.S.C. § 2253(c)(2) (2000). A prisoner satisfies this standard by demonstrating that reasonable jurists would find that his constitutional claims are debatable and that any dispositive procedural ruling by the district court is likewise debatable. See Miller-El v. Cockrell, 537 U.S. 322, 336, 123 S.Ct. 1029, 154 L.Ed.2d 931 (2003); Slack v. McDaniel, 529 U.S. 473, 484, 120 S.Ct. 1595, 146 L.Ed.2d 542 (2000); Rose v. Lee, 252 F.3d 676, 683 (4th Cir.2001). We have independently reviewed the record and conclude that Byrd has not made the requisite showing. Accordingly, in No. 05-6954 we deny a certificate of appealability and dismiss the appeal.
We grant Byrd’s motion to seal his informal brief. 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.