this second motion, defendants’ motion to vacate is accordingly denied.
This appeal followed.
We reverse and remand to the district court to consider the Ciramis’ new evidence.
II.
Rule 60(b) of the Federal Rules of Civil Procedure provides in part:
On motion and upon such terms as are just, the court may relieve a party or his legal representative from a final judgment, order, or proceeding for the following reasons: (1) mistake, inadvertence, surprise, or excusable neglect; (2) newly discovered evidence . . .; (3) fraud ., misrepresentation, or other misconduct of an adverse party; (4) the judgment is void; (5) the judgment has been satisfied, released, or discharged, .; or (6) any other reason justifying relief from the operation of the judgment. The motion shall be made within a reasonable time, and for reasons (1), (2), and (3) not more than one year after the judgment order, or proceeding was entered or taken.
Clause (6), the basis for the motion before us, has been described by Professor Moore as “a grand reservoir of equitable power to do justice in a particular case when relief is not warranted by the preceding clauses,” 7 Moore’s Federal Practice 160.27[2], at 375 (2d ed.rev.1975), which, in a proper case, is to be “liberally applied.” Id. at 352. It is well established, however, that a “proper case” for Rule 60(b)(6) relief is only one of “extraordinary circumstances,” Ackermann v. United States, 340 U.S. 193,199, 71 S.Ct. 209, 95 L.Ed. 207 (1950), or “extreme hardship,” United States v. Karahalias, supra, 205 F.2d at 333.
As the language of the rule makes clear, relief under clause (6) is available only when the movant acts in a timely fashion and asserts a ground justifying relief that is not a ground encompassed within any of the first five clauses. While all motions made pursuant to Rule 60(b) must be brought “within a reasonable time,” the rule specifies that those falling under the first three clauses must, in addition, be brought within a year of the entry of the challenged judgment. Thus, when the reason asserted for relief comes properly within one of those clauses, clause (6) may not be employed to avoid the one-year limitation.
The motion at issue on this appeal was made slightly more than two years after summary judgment on the tax assessment claim was entered against the Ciramis. We have examined the motion and the grounds advanced in support of it, and we conclude that those grounds do not come within the scope of the first five clauses of Rule 60(b), but, indeed, constitute an “other reason justifying relief,” and the motion is thus not subject to a one-year time limit. Moreover, we believe it to have been made within a reasonable time.
In our earlier Cirami opinion, we found the Ciramis’ first Rule 60(b)(6) motion timely. 535 F.2d at 742. That opinion was filed on May 10, 1976. The instant motion was dated July 28, 1976. The Ciramis have alleged that it was only by virtue of our opinion that they were able at last to meet with Newman and learn the reason for his behavior and default. They filed their new motion just two and one-half months after our decision was handed down. What is a “reasonable time” is a question to be answered in light of all the circumstances of the case. So viewed here, we find that the second motion was timely.
The government’s reliance on the doctrine of law of the case is misplaced. The court below was not precluded from considering the new evidence offered by appellants. When an appellate court has once decided an issue, the trial court, at a later stage in the litigation, is under a duty to follow the appellate court’s ruling on that issue, see Munro v. Post, 102 F.2d 686, 688 (2d Cir. 1939), and is precluded from altering the appellate decision. United States v. Fernandez, 506 F.2d 1200,1202-03 (2d Cir. 1974); 1B Moore’s Federal Practice ¶ 0.404[10] (2d ed.rev.1974). This is what is