Dismissed by unpublished PER CURIAM opinion.

Unpublished opinions are not binding precedent in this circuit.

Carlos Perry seeks to appeal his conviction and sentence. In criminal cases, the defendant must file the notice of appeal within fourteen days after the entry of judgment. Fed. R.App. P. 4(b)(1)(A). With or without a motion, upon a showing of excusable neglect or good cause, the district court may grant an extension of up to thirty days to file a notice of appeal. Fed. R.App. P. 4(b)(4); United States v. Reyes, 759 F.2d 351, 353 (4th Cir. 1985). Although the time limitations imposed by Rule 4(b) are not jurisdictional, they “must be enforced by th[e] court when properly invoked by the government.” United States v. Mitchell, 518 F.3d 740, 744 (10th Cir. 2008). If the government notes its objection for the first time in its merits brief to the appellate court or earlier in the proceedings, the objection is considered properly invoked. United States v. Watson, 623 F.3d 542, 546 (8th Cir. 2010).

Here, the district court entered judgment on May 16, 2014. Perry filed his notice of appeal on July 25, 2014. 1 The government properly invoked its objection to Perry’s late filing by stating the objection in its brief to this court. Because Perry did not file a notice of appeal that was timely or within the time period during which the district court had the authority to extend the appeal period, Fed. RApp. P. 4(b)(4), 2 and the government *253 validly objected, we dismiss Perry’s appeal.

We dispense with oral argument because the facts and legal contentions are adequately presented in the materials before this court and argument would not aid the decisional process.

DISMISSED.