Dismissed by published opinion. Judge LUTTIG wrote the opinion, in which Judge NIEMEYER and Judge TRAXLER joined.
OPINION
The appellants, Lisa Jones Panhorst and her parents, appeal the district court’s *369 grant of summary judgment to the United States in an action brought under the Federal Tort Claims Act. We hold that appellants’ notice of appeal was untimely and that the limited “unique circumstances” exception to the jurisdictional requirement of a timely notice of appeal does not apply. Accordingly, we dismiss this appeal for lack of jurisdiction.
I.
Lisa Jones Panhorst is paralyzed in both legs. Panhorst and her parents sued American Cyanamid Company (“Cyanam-id ”) in the District of South Carolina, claiming that Panhorst contracted polio through contact with an unknown child who had recently been administered a defective dose of Orimune, a polio vaccine manufactured by American Cyanamid. While that action was pending, appellants filed the present action against the United States under the Federal Tort Claims Act in the District of Maryland. Appellants claim that the United States negligently licensed and released a defective vaccine that was thereafter administered to a child from whom Panhorst contracted polio.
In Cyanamid, the district court granted summary judgment to the defendant on the issue of causation, holding that Pan-horst failed to present sufficient evidence-that she contracted Type III polio from American Cyanamid’s vaccine. 1 App. 259. Subsequently, the district court in the present lawsuit granted summary judgment to the United States based on the collateral estoppel effect of Cyanamid. App. 172-79.
The district court entered the order granting summary judgment to the United States on March 3, 1998. On March 20, 1998, appellants filed a motion for rehearing and reconsideration under Fed. R.Civ.P. 59, citing newly discovered evidence of alleged improprieties in the licensing of Orimune. 2 Because appellants knew that the period permitted by the Federal Rules of Civil Procedure for filing a Rule 59 motion had elapsed, they also filed a motion to consider the Rule 59 motion out of time, along with an order for the court’s signature that granted appellants permission to file an untimely Rule 59 motion.
The district court signed the order submitted by appellants and held a hearing on the Rule 59 motion, which it subsequently denied on July 30, 1999. On September 21, 1999 — within sixty days of the denial of the untimely Rule 59 motion, but more than sixty days after entry of the original summary judgment order — appellants noted this appeal.
II.
The United States argues that we have no jurisdiction over this appeal because the notice of appeal was filed out of time. We agree. Because appellants’ Rule 59 motion was untimely, it did not defer the sixty-day period for filing a notice of appeal, which continued to run from the entry of the summary judgment order. Accordingly, appellants’ notice of appeal— filed more than sixty days after the summary judgment order — was untimely as well. We would thus have jurisdiction over this appeal only if the “unique circumstances” doctrine cured the jurisdictional defect caused by appellants’ tardy notice of appeal. We conclude that the unique circumstances doctrine does not apply to the facts of this case, and we therefore dismiss for lack of jurisdiction.
A.
The Supreme Court has repeatedly emphasized that the requirement
*370
of a timely notice of appeal is “mandatory and jurisdictional.”
Browder v. Director, Dep’t of Corrections,
The timeliness of appellants’ notice of appeal thus depends entirely upon whether their Rule 59 motion was timely. A motion to alter or amend the judgment under Rule 59(e) is timely only if filed within ten days after entry of the judgment, not including Saturdays, Sundays, or legal holidays. Fed.R.Civ.P. 59(e) (A motion under Rule 59(e) “shall be filed no later than 10 days after entry of the judgment.”) (emphasis added); Fed.R.Civ.P. 6(a) (computation of time where a prescribed period is less than eleven days). The district court “may not extend the time for taking any action under Rules ... 59(b), (d) and (e), except to the extent and under the conditions stated in them.” Fed.R.Civ.P. 6(b). Rule 59(e), in turn, simply does not provide any mechanism for extending the prescribed ten-day filing deadline. Thus, the Federal Rules clearly prescribe that a motion under Rule 59(e) must be filed within ten days after entry of the judgment, and the Rules just as clearly provide the district court with no authority to extend the filing period.
Here, the district court entered the summary judgment order in favor of the United States on March 3, 1998. Appellants had until March 17, 1998 — ten days after the entry of the summary judgment order, excluding Saturdays, Sundays, and legal holidays — to file their Rule 59 motion. Instead, they filed their Rule 59 motion on March 20, 1998. Because an untimely Rule 59 motion cannot defer the time for filing a notice of appeal, appellants were required to note their appeal by May 4, 1998, sixty days from the entry of summary judgment. The notice of appeal filed on September 21, 1999 — over 180 days from the entry of judgment — was therefore tardy. Unless there is an applicable exception to the rule that a timely notice of appeal is mandatory and jurisdictional, we lack jurisdiction over this appeal.
B.
Appellants seek refuge from the mandatory filing requirements of the Rules by invoking the limited “unique circumstances” doctrine recognized by the Supreme Court in a trio of cases in the early 1960s.
See Wolfsohn v. Hankin,
In view of the obvious great hardship to a party who relies upon the trial judge’s finding of “excusable neglect” prior to the expiration of the 30-day period and then suffers reversal of that finding, it should be given great deference by the reviewing court.
Harris,
In
Thompson,
the Court again applied the
Harris
doctrine, over the vigorous dis
*371
sent of four Justices. The petitioner in
Thompson
filed a motion for a new trial twelve days after final judgment. The district court assured him that the motion was actually filed “ ‘in ample time’ ” and went on to decide it on its merits.
Thompson,
Finally, in
Wolfsohn,
the Supreme Court summarily reversed, in a one-sentence memorandum opinion, the dismissal of another untimely appeal where the district court had extended the ten-day period for filing a motion under Rule 59(b).
Wolfsohn,
The Supreme Court has not applied the unique circumstances doctrine since
Wolf-sohn,
and subsequent caselaw effectively calls the validity of the doctrine into doubt. Since 1964, when
Wolfsohn
was decided, the Supreme Court has repeatedly emphasized that the time limits imposed by the Federal Rules are “mandatory and jurisdictional.”
See, e.g., Griggs v. Provident Consumer Discount Co.,
Indeed, our sister circuits have also questioned the vitality of the unique circumstances doctrine in the wake of
Browder
and other cases that stress the mandatory and jurisdictional nature of filing requirements.
See, e.g., Pinion v. Dow Chemical, U.S.A.,
*372 Petitioner asserts that [Harris, Thompson, and Wolfsohn ] establish an equitable doctrine that sometimes permits the late filing of notices of appeal. Our later cases, however, effectively repudiate the Harris Truck Lines approach, affirming that the timely filing of a notice of appeal is “mandatory and jurisdictional.”
Houston v. Lack,
C.
In
Osterneck v. Ernst & Whinney,
[The unique circumstances doctrine] applies only where a party has performed an act which, if properly done, would postpone the deadline for filing his appeal and has received specific assurance by a judicial officer that this act has been properly done.
Osterneck,
Second, the act of filing an untimely Rule 59 motion is not one that can “postpone the deadline for filing [an] appeal.” Oste
rneck,
Third, not only can an untimely Rule 59 motion never be “properly done,” but the district court in this case did not provide “specific assurance” that “this act [was] properly done.”
Osterneck,
Moreover, even if the district court’s order could be characterized as an assurance within the meaning of
Osterneck,
appellants did not reasonably rely on that assurance, as numerous courts of appeal have interpreted the unique circumstances doctrine to require.
See, e.g., Pinion,
We therefore hold that the limited unique circumstances doctrine does not apply to the facts of this case. The filing of an untimely Rule 59(e) motion is not an act that can be “properly done” or that can “postpone the deadline for filing [an] appeal,” nor did appellants receive or reasonably rely on “specific assurance by a judicial officer that this act [was] properly done.”
Osterneck,
Filing deadlines, like statutes of limitations, necessarily operate harshly and arbitrarily with respect to individuals who fall just on the other side of them, but if the concept of a filing deadline is to have any content, the deadline must be enforced.
United States v. Locke,
CONCLUSION
For the foregoing reasons, we dismiss this appeal for lack of jurisdiction.
DISMISSED.
Notes
. This court affirmed the district court’s judgment in
Jones v. American Cyanamid Co.,
. Although appellants did not specify the section of Rule 59 on which they relied, the district court considered the motion under Rule 59(e) ("Motion to Alter or Amend Judgment”). J.A. 242.
. A summary disposition does not enjoy the same precedential value as a full opinion of the Court on the merits.
Edelman v. Jordan,
. We have cited the unique circumstances doctrine in only three cases. In
Myers v. Stephenson,
. In
Osterneck,
the Supreme Court refused to apply
Thompson
where a party had mistakenly viewed its initial notice of appeal as effective despite the pendency of a motion that made that notice a nullity.
Osterneck,
