dissenting.

The' Court finds that Roche v. McDonald, 275 U. S. 449, is “dispositive of the merits” of this case. I agree that that case demands the remand of this one; more than" that can be found only by misconceiving what this case is about or what Roche v. McDonald decided.

1. Article IV, § 1 of the Constitution commands the courts of each State to give “Full Faith and Credit . . . to the . . . judicial Proceedings of every other State,” and we have interpreted this command so straitly as to mean, that the State of the forum cannot go behind the judgment of a .sister State to establish such an allegation as that the judgment was procured by fraud, Christmas v. Russell, 5 Wall. 290, or that the judgment creditor was not the real party in interest, Titus v. Wallick, 306 U. S. 282. We have even required a State which prohibited the enforcement of gambling contracts to give full faith and credit to another State’s judgment úpon such a contract when the contract itself was entered in the State which regarded it as illegal. Fauntleroy v. Lum, 210 U. S. 230. See also Kenney v. Supreme Lodge, 252 U. S. 411; Morris v. Jones, 329 U. S. 545.

2. Considerations of policy lying behind the Full Faith and Credit Clause, however, are by no means so forcibly presented where the issue is simply whether the forum must respect the limitation period attached to a foreign judgment or whether it may apply its own. This Court has accordingly held that a State may refuse to enforce *46the judgment of another State brought later than its own statute of limitations permits even though the judgment would still have been enforceable in the State which rendered it. M’Elmoyle v. Cohen, 13 Pet. 312; Bacon v. Howard, 20 How. 22.

3. Conversely, where the enforcement of a judgment by State A is sought in State B, which has a longer limi-. tation period than State A, State B is plainly free to enter its own judgment upon the basis of State A’s original judgment, even though that judgment would no longer be enforceable in State A. If enforcement of State B’s new judgment is then sought in Staté A, State A cannot refuse to enforce it without violating the principle that the State where enforcement of a judgment is sought cannot look behind the judgment. That was the situation in Roche v. McDonald, 275 U. S. 449, and we' there held.

4. The present situation is this: Colorado entered a judgment in 1927 which in 1945 was there revived in accordance with Colorado’s procedure. In 1945 the 1927 judgment could not have been enforced in Missouri because barred by that State’s statute of limitations. The question whether the 1945 proceedings gave rise to a judgment enforceable in Missouri thus depends, obviously, on whether those proceedings created a new Colorado judgment, or whether they merely had the effect of extending the Colorado statute Of limitations on the old judgment. Only in the former case would Roche v. McDonald be “dispositive of the merits”; in the latter, it is. equally clear that M’Elmoyle v. Cohen, supra, 13 Pet. 312, and Bacon v. Howard, supra, 20 How. 22, would be controlling. Fundamental, therefore, to the issue of full faith and credit is an initial determination as to the effect in Colorado of its reviver proceedings.

5. The opinion of the Supreme Court of Missouri is not unequivocal. It couljd hardly, however, have assumed *47the law of Colorado to be that reviver proceedings create a new judgment, for it chiefly relied upon a decision of its own according full recognition to Roche v. McDonald and other cases invoking the principle that the forum cannot look behind a judgment brought there for enforcement. See Northwestern Brewers Supply Co. v. Vorhees, 356 Mo. 699, 703, 203 S. W. 2d 422, 424. Surely we ought not to attribute to a State court- a flagrant disregard of the decisions of this Court, particularly when it shows awareness of these decisions.1 The more obvious interpretation of the Missouri court’s opinion is that it assumed the effect of the Colorado proceedings to be what the face of the Colorado statute implies, namely/ to extend the statute.of limitations on the original judgment.2 We should affirm, therefore, but for language which suggests a third view: that because the original judgment would have been unenforceable in Missouri at the time of the reviver proceedings, those proceedings were not entitled to full faith and credit no matter what their effect under Colorado law. ' If in fact the Colorado proceedings had resulted in a hew judgment, this view would have disregarded Roche v. McDonald. But a State court may reach the right result despite an awkward formulation of the issue before it. Petitioner, to be entitled- to redress, must establish. that Colorado gave it a judgment which Missouri flouted, and it fails *48to do so unless it shows that under Colorado law a judgment of reviver is a new judgment.

6. The Court does not find that petitioner has sustained this burden, and we should neither initiate an independent examination of Colorado law nor rest upon phrases in a single decision that does not explicitly adjudicate the question. Yet the Court concludes, “In this case it is the 1945 Colorado judgment that claims full faith and credit in Missouri, No Missouri statute of limitations is tendered to cut off a cause of action based-on. judgments of that vintage.” But the very question of Colorado law in issue is whether the 1945 proceedings did in fact create a. new judgment entitled to claim full faith and credit. Since in the view most favorable to petitioner it is not clear whether the courts of Missouri have resolved this issue against petitioner or left it undecided, we should not by affirming foreclose all opportunity for petitioner to establish that the true effect of the reviver proceedings was to grant it a new judgment. But neither should we foreclose the issue in petitioner's favor.

In view of the unresolved elements of the situation, the procedure outlined in Minnesota v. National Tea Co., 309 U. S. 551, 557, should be followed in disposing, of this case. Accordingly, I would vacate the judgment of the Supreme Court of Missouri and remand the case for further proceedings.

delivered the opinion of the Court.

Missouri has a statute which limits the life of a judgment to ten years.after its original rendition or Wn years after its revival.1 Missouri also provides that no judgment can be revived after ten years from its rendition.2 These provisions are applicable to all judgments whether rendered by a Missouri court or by any other court.

Petitioner has a Colorado judgment against respondent; It was obtained in 1927 and revived in Colorado3 in 1945 on personal service upon respondent in Missouri. Suit was then brought in Missouri on the revived Colorado judgment. The Supreme Court of Missouri, though assuming that the judgment was valid in Colorado, refused to enforce it because the original judgment under. Missouri’s law could not have been revived in 1945. It held that the lex fori governs the limitations of actions and that the Full Faith and Credit Clause of the Constitution, Art. IV, § 1, did not require Missouri to recognize Colorado’s more lenient policy as respects revival of judgments. 358 Mo. 65, 213 S. W. 2d 416.

1. Petitioner sought to bring the case here by appeal. But we postponed the question of jurisdiction *to the merits. Certiorari, not appeal, is the route by which the question whether or not full faith and credit has been given a foreign judgment is brought here. Roche v. McDonald, 275 U. S. 449; Morris v. Jones, 329 U. S. 545. *40Hence we treat the papers as a petition for certiorari, 28 U. S. C. § 2103, and grant it.

2. The opinion of the Supreme Court of Missouri was handed down July 12, 1948, and the motion for rehearing or for transfer to the court en banc4 was denied September 13, 1948. The appeal was allowed by the Missouri court on December 13,1948. That was within three months and therefore timely prior to the revision of the Judicial Code. But 28 U. S. C. § 2101 (c), effective September 1, 1948, reduced that period to ninety days. The ninetieth day was December 12, 1948, which was a Sunday. There is a contrariety of views whether an act which by statute is required to be done within a stated period may be done a day later when the last day of the period falls on Sunday.5 Thus Street v. United States, 133 U. S. 299, treating Sunday as a dies non under a statute which authorized the President to transfer army officers from active duty and to fill vacancies in the active list on or before January 1, 1871, allowed the action to be taken on the following day. We think the policy of that decision is applicable to 28 U. S. C. §2101 (c). Rule 6 (a) of the Rules of Civil Procedure provides that where the last day for performance of an act falls on a Sunday or a legal holiday, performance on the next day which is not a Sunday or legal holiday is timely;6 That *41rule provides the method for computation of time prescribed or allowed not only by the rules or by order of court but by “any applicable statute.” Since the rule, had the concurrence of Congress,7 and since no contrary policy is expressed in the statute governing this review, we think that the considerations of liberality and leniency which find expression in Rule 6 (a) are equally applicable to 28 U, S. C. § 2101 (c). The appeal therefore did not fail for lack of timeliness.

3. Roche v. McDonald is dispositive of the merits. Roche had a Washington judgment against McDonald. He brought suit on that judgment in Oregon. He obtained a judgment in Oregon at a time when the original judgment had by Washington law expired and could not be revived. Roche then sued in Washington on the Oregon judgment. The Court reversed the Supreme Court of Washington which had. held that full faith and credit need not be given the Oregon judgment since it would have been void and of no effect if rendered in Washington. The Court held that once the court of the sister State had jurisdiction over the parties and of the subject matter its judgment was valid and could not be impeached in the State of the forum, even though it could not have been obtained there. That decision was in line with Fauntleroy v. Lum, 210 U. S. 230 and Christmas v. Russell, 5 Wall. 290. For in those cases the Court *42had held that the State of the forum could not defeat the foreign judgment because it was obtained by a procedure hostile to or inconsistent with that of the forum or because it was based on a cause of action which the forum itself would not have recognized.

Any other result would defeat the aim of the Full Faith and Credit Clause and the statute enacted pursuant to it.8 It is when a. clash of policies between two states "emerges that the need of the Clause is the greatest. It and the statute which implements it are indeed designed to. resolve such controversies. Morris v. Jones, supra. There is no room for an exception, as Roche v. McDonald makes plain, where the clash of policies relates to revived judgments rather than to the nature of the underlying claim as in Fauntleroy v. Lum, supra. . It is the judgment that must be given full faith and credit. In neither case can its integrity be impaired, save for attacks on the jurisdiction of the court that rendered it.

Cases of statute of limitations against a cause of action on a judgment (M’Elmoyle v. Cohen, 13 Pet. 312) in*43volve different considerations - as Christmas v. Russell, supra, p. 300, long ago pointed out. They do not undermine the integrity of the judgment on which suit is brought. In this case it is the 1945 Colorado judgment that claims full faith and credit in Missouri. No Missouri statute of limitations is tendered to cut off a cause of action based on judgments of that vintage.

It is argued, however, that under Colorado law the 1945 Colorado judgment is not a new judgment and that the revivor did no more than extend the statutory period in which to enforce the old judgment.9 It is said that those were the assumptions on which the Missouri court proceeded. But we would have to add to and subtract from its Opinion to give it that meaning. For when it placed revived judgments on the same basis as original judgments, it did so because of Missouri not Colorado law.10

This is not a situation where Colorado law also makes that conclusion plain. The Colorado authorities which *44have been cited to us indeed seem to hold just the opposite. Thus La Fitte v. Salisbury, 43 Colo. 248, 95 P. 1065, holds that a revived judgment has the effect of a new one.11 We are referred to "no Colorado authorities to the contrary.

But since the status of the 1945 judgment under Colorado law was not passed upon by the Missouri court, we do not determine the question. For the same reason we do not consider whether the service on which the Colorado judgment was revived satisfied due process. See Owens v. Henry, 161 U. S. 642. Both of those questions will be open on remand of the cause.

The suggestion that we follow the course taken in Minnesota v. National Tea Co., 309 U. S. 551, and vacate the judgment and remand the cause to the Missouri court so that it may- first pass on these questions would be appropriate only if it were uncertain whether that court adjudicated a federal question. That course is singularly inappropriate here since it is plain that the Missouri court held that, whatever, the effect of revivor under Colorado law, the Colorado judgment was not entitled to full faith. *45and credit in Missouri. That holding is a ruling on a federal question and it cannot stand if, as assumed, the Colorado judgment had the force and effect of a new one.

Reversed.