This аppeal presents a question of first impression for our circuit: whether a district court has discretion not to consider a petitioner’s arguments regarding the timeliness of his federal habeas petition when the petitioner raises the timeliness arguments for the first timе in his objections to a magistrate judge’s report and recommendation. For the reasons that follow, we conclude that the district court has such discretion and, under the circumstances of this case, did not abuse its discretion. Accordingly, we affirm the district court’s judgment of dismissal of *1289 Steadroy Williams’s 28 U.S.C. § 2254 ha-beas petition as time-barred.
I. STATEMENT OF THE CASE
In September 2002, a Florida jury convicted Williams of armed kidnaping and armed robbery, and the state trial court sentenced him to a prison term of forty years, ten of which were mandatory. Williams filed a nоtice of appeal on September 25, 2002, and the Florida District Court of Appeal affirmed Williams’s judgment and sentence on October 29, 2003.
On June 15, 2004, Williams filed a pro se state petition for post-conviction relief pursuant to Florida Rule of Criminal Procedure 3.850, which the state trial court dеnied on September 10, 2004. On November 17, 2005, Williams filed a motion for belated appeal, which the appellate court granted on February 9, 2006. On March 1, 2006, Williams appealed the denial of his petition for post-conviction relief, and on April 4, 2006, the Florida District Court of Appeal affirmed the trial court’s order denying Williams state post-conviction relief.
Williams filed a federal habeas petition on October 8, 2006, in which he wrote that the state appellate court affirmed his belated appeal on May 26, 2006, and сontended that his federal petition was timely because his state post-conviction petition was pending from June 17, 2004, to May 26, 2006. The State responded, arguing that Williams’s federal habeas petition was time-barred under the one-year time limit on federal habeаs petitions in 28 U.S.C. § 2244. The State claimed that the one-year limitations period ran for 140 days before Williams filed his state petition for post-conviction relief on June 15, 2004, which tolled the one-year limitations period. According to the State, the clock restartеd when the state trial court denied Williams’s motion for post-conviction relief on September 10, 2004, and ran for 433 days until he filed his motion for belated appeal of the denial of his post-conviction petition. The State posited that the clock did not stop while his motion for a belated appeal was pending, so another 84 days passed before the Florida District Court of Appeal issued its March 1, 2006, mandate allowing Williams’s appeal. The clock restarted when Williams’s subsequent appeal was denied and ran for another 135 days until Williams filed his federal habeas petition. The State thus argued that 792 days of untolled time passed before Williams filed his federal habeas petition, and, therefore, the petition was time-barred under the statute.
The district court referred the matter to the federal magistrate judge for a report and recommendation. See 28 U.S.C. § 636, et seq. (2006). The magistrate judge instructed Williams to file, by August 3, 2007, a reply to the State’s response asserting that the petition was untimely. Williams did not file a reply. 1 On November 9, 2007, the magistrate judge issued a rеport and recommendation, recommending that the district court dismiss Williams’s habeas petition as time-barred. Williams filed objections to the magistrate judge’s report and recommendation, asserting that he had filed a notice of appeal from the trial court’s denial of his post-conviction motion in October 2004, but did not discover until September 2005 that prison authorities never mailed his notice of appeal to the Florida District Court of Appeal. Thus, Williams argued that under the “prison mailbox rule,” the *1290 limitations period wаs tolled from the day he signed the petition until the day in September 2005 that he discovered that the authorities had not mailed it. 2 Williams also contended that the limitations period was tolled while his motion for a belated appeal was pending in the state apрellate court, from November 17, 2005, to February 9, 2006. Therefore, Williams claimed that only 346 days had passed, and his federal habeas petition was timely filed.
In its order, the district court stated that it conducted a de novo review of the case but did not consider Williams’s arguments regarding the timeliness of his petition. The district court noted that Williams never filed a reply to the State’s response and found that he argued, for the first time in his objections to the magistrate judge’s report and recommendation, that the limitations period was tolled for a nine-month period due to the prison authorities’ failure tо mail his notice of appeal. The district court concluded that it may decline to consider arguments raised for the first time in the objections to the magistrate judges’s report and recommendation, and doing so was warranted in this case based on Williams’s failurе to respond to the magistrate judge’s order directing him to file a reply on the precise issue of timeliness. Accordingly, the district court adopted the magistrate judge’s report and recommendation and dismissed Williams’s petition as time-barred.
The district court granted Williams’s motion for a certificate of ap-pealability (“COA”). 3 In his request for a COA, Williams asserts that the district court was required to consider his timeliness arguments raised for the first time in his objections to the magistrate judge’s report and recommendation, and this court should reverse the district court’s judgment dismissing his federal habeas petition as time-barred and remand for reconsideration, taking into account Williams’s arguments regarding timeliness. 4
II. STANDARD OF REVIEW
We review for abuse of discretion a district court’s treatment of a magistrate judge’s report and recommendation.
Stephens v. Tolbert,
III. DISCUSSION
In
Stephens v. Tolbert,
we held that a district court does not abuse its discretion by considering an argument that wаs not presented to the magistrate judge.
Under the Federal Magistrates Act, “the magistrate [judge] has no authority to make a final and binding” ruling on a dispositive motion.
United States v. Raddatz,
A judge of the court shall make a de novo determination of those portions of the report or specified proposed findings or recommendations to which objection is made. A judge of the court may accept, reject, or modify, in whole or in part, the findings or recommendations made by the magistrate judge. The judge may also receive further evidence or recommit the matter to the magistrate judge with instructions.
28 U.S.C. § 636(b)(1);
see also
Fed. R.Civ.P. 72(b) (implementing and reflecting the breadth of statutory discretion set forth in the Federal Magistrates Act). In discussing the Act, the Supreme Court noted that the purpose of the Act’s language “was to vest ‘ultimate adjudicatory power over dispоsitive motions’ in the district court while granting the ‘widest discretion’ on how to treat the recommendations of the magistrate.”
Raddatz,
Circuit courts differ on the meaning of
de novo
review by the district court as stated in the Magistrates Act and Federal Rule of Civil Procedure 72(b). For example, in
United States v. George,
the Fourth Circuit held that as part of its obligation to determine
de novo
any issue considered by the magistrate judge to which a proper objection is made, a district court must consider all arguments, regardless of whether they were raised before the magistrate judge.
*1292
help alleviate the workload of the district judges, “it would be fundamentally unfair to permit a litigant to set its case in motion before the magistrate, wait to see which way the wind was blowing, and — having received an unfavorable recommendation — shift gears befоre the district judge.”
Id.
at 991. Similarly, the Tenth Circuit stated that “[ijssues raised for the first time in objections to the magistrate judge’s recommendation are deemed waived.”
Marshall v. Chater,
The Ninth Circuit noted that “allowing parties to litigate fully their case before the magistrate and, if unsuccessful, to change their strategy and present a different theory to thе district court would frustrate the purpose of the Magistrates Act.”
Greenhow v. Sec’y of Health & Human Servs.,
In this case, the district court acknowledged that it had discretion to consider Williams’s timeliness argument but declined to do so because Williams failed to respond to the magistrate’s order directing him to file a reply on the precise issue of timeliness. The district court retained the final adjudicative authority and properly exercised its discretion in deciding whether to consider any new arguments raised by Williams in his objections to the magistrate judge’s report and recommendation.
See Raddatz,
AFFIRMED.
Notes
. Williams's cоunsel stated in the appellate brief and during oral argument to this court that she misread the district court's order and believed that the electronic file was a duplicate copy of the State's response to a Show Cause Order. As such, she did not file a reply.
. Under the "prison mailbox rule," a
pro se
prisoner’s court filing is deemed filed on the date it is delivered to prison authorities for mailing.
See
Fed. R.App. P. 4(c);
Houston v. Lack,
. In its order granting a COA, the district court noted that "jurists of reason could find it debatable whether the Court was required to consider Mr. Williams’ arguments regarding timeliness.” (R. Yol. 1, Doc. 21 at 2.)
.On appeal, Williams also argues that we should consider the merits of his timeliness argument. Our appellate review is limited to the issues specified in the COA.
See Murray v. United States,
