Opinion by Judge CANBY; Concurrence by Judge GOULD.

Petitioner Thomas James Welch, a prisoner of the State of California, appeals from the federal district court’s dismissal of his petition for a writ of habeas corpus. The district court determined that Welch had failed to satisfy the one-year statute of limitations for a state prisoner filing a federal habeas petition, see 28 U.S.C. § 2244 (d)(1), and therefore dismissed the petition as untimely. We conclude that the period of limitations was tolled to an extent that rendered Welch’s petition timely. We accordingly reverse.

*1015 Background.

Welch is a California state prisoner serving a life sentence with the possibility of parole. He pled guilty to two counts of attempted murder, and his conviction became final on December 17, 1993. On January 12, 1994, Welch filed a petition for writ of habeas corpus in the California Superior Court, attacking the validity of his guilty plea. The court denied the petition on March 17, 1994. Over four years later, on August 22,1998, Welch submitted an original petition for writ of habeas corpus to the California Supreme Court. The petition raised claims that were different from the claim he raised in the Superior Court. 1 The California Supreme Court denied this petition without comment or citation on February 24,1999.

Welch then filed a petition for writ of habeas corpus with the federal district court on March 25,1999. The State filed a motion to dismiss, asserting that the petition was barred by the one-year limitation period in 28 U.S.C. § 2244 (d)(1).

The district court granted the motion. It reasoned that Welch had only one year after the passage of § 2244(d)(1) to file his petition, and that year expired on April 24, 1997; Welch’s 1999 federal petition was therefore untimely. The district court subsequently granted a certificate of ap-pealability, and this appeal followed.

Discussion

Effective April 24, 1996, Congress enacted the Antiterrorism and Effective Death Penalty Act of 1996, Pub. L. No. 104-132, 110 Stat. 1214, (“AEDPA”). AEDPA imposed, for the first time, a one-year statute of limitations for state prisoners filing federal petitions for habeas corpus. See 28 U.S.C. § 2244 (d)(1). For prisoners like Welch, whose convictions had become final before passage of AED-PA, the one-year limitations period began running on AEDPA’s effective date, April 24, 1996, and expired on April 24, 1997, unless it was tolled. Patterson v. Stewart, 251 F.3d 1243, 1246 (9th Cir.2001).

The AEDPA limitation is subject to an important tolling provision, however. It provides: “The time during which a properly filed application for State post-conviction or other collateral review ... is pending shall not be counted toward any period of limitation.” 28 U.S.C. § 2244 (d)(2). The district court determined that the one-year limitations period was not tolled between the date of denial of Welch’s petition by the California Superior Court and the date of Welch’s filing of his original habeas petition with the California Supreme Court, because no properly filed petition was pending during that period. Consequently, under the district court’s view, Welch’s one year to file a federal petition ended on April 24, 1997, making his 1999 federal habeas petition untimely.

We reject the district court’s analysis. 2 Under our case law, post-conviction review is “pending” — and thus AEDPA’s statute of limitations is tolled— *1016 from “the time the first state habeas petition is filed until the California Supreme Court rejects the petitioner’s final collateral challenge.” Nino v. Galaza, 183 F.3d 1003, 1006 (9th Cir.1999) (emphasis added). This tolled period includes intervals between the disposition of a state court petition and the filing of a subsequent petition at the next state appellate level. Id. Under this rule, therefore, Welch’s state post-conviction review was “pending” from the entire period between January 12, 1994-the date on which Welch filed his first petition for writ of habeas corpus in the California Superior Court-until February 24, 1999, when the California Supreme Court rejected Welch’s final challenge. Consequently, AEDPA’s one-year statute of limitations was tolled from April 24, 1996, the date on which AEDPA was enacted, until February 24, 1999, and Welch’s March 1999 federal petition was timely.

The State argues that the statute of limitations was not tolled here for two reasons, neither of which convinces us. The State first observes that AEDPA’s limitations period is tolled only when a petitioner is 'properly pursuing his state collateral remedies, see Nino, 183 F.3d at 1006 . 3 The State contends that Welch did not properly pursue such remedies here because he waited four and a half years to file his subsequent petition with the California Supreme Court. 4

This argument runs afoul of our decision in Saffold v. Newland, 250 F.3d 1262 (9th Cir.2000). There, we concluded that a petitioner was entitled to statutory tolling under AEDPA even though the petitioner had waited four and one-half months after the California Court of Appeal denied his petition before he filed his next petition in the California Supreme Court. Id. at 1267-68 . Our decision in Saffold turned, not on the length of the time gap between petitions, but on the fact that the California Supreme Court had addressed Saf-fold’s petition on the merits. 5 Id. at 1267 . We reasoned that the purpose of AEDPA’s tolling provision was to give state courts an opportunity to address the merits of the petitioner’s claim before the federal courts intervened, and thus we declined to adopt a rule that would have required Saffold to have filed his federal petition before the California Supreme Court ruled on the merits of his claim. Id.

In so ruling, we emphasized that we were merely following the tolling rule set out in Nino , which provides that time is tolled under AEDPA while a petitioner is “attempting to exhaust state collateral remedies through proper use of state court *1017 procedures.” Id. at 1266 (citing Nino, 183 F.3d at 1006 ) (emphasis added in Saffold). Applying this rule, we implicitly recognized that the question of whether a petitioner has made “proper” use of state court post-conviction relief procedures is for the state courts, rather than' the federal courts, to decide. 6 Id. at 1266-67. Because the California Supreme Court had addressed the petitioner’s claim on the merits, we viewed the California Supreme Court as having recognized the petitioner’s use of post-conviction relief procedures to have been “proper,” and thus within AED-PA’s tolling provision. Id. at 1267-68.

Saffold is controlling in this case because the California Supreme Court’s order denying Welch relief without comment or citation constituted a denial on the merits. See Hunter v. Aispuro, 982 F.2d 344, 347-48 (9th Cir.1992). 7 Thus, notwithstanding Welch’s four and one-half year delay, his use of California post-conviction relief procedures must be deemed 'to have been “proper” under our reasoning in Saf-fold. Consequently, Welch’s delay in filing does not defeat tolling under AEDPA.

The State’s next argument ,is that there was no tolling between the denial of Welch’s first petition and the filing of his second petition because the claims raised in the first petition were altogether different from the claims raised in the second. Under the State’s view, because Welch never followed up on the claim he raised in the first petition, there was no review “pending” from March 25, 1994, when the Superior Court denied Welch’s petition, to August 22, 1998, when Welch filed his original petition with the California Supreme Court.

We reject this contention. Recognizing that a petitioner can file multiple petitions while seeking to exhaust relief in California, we held in Nino that AEDPA’s statute of limitations is tolled from the time “the first state habeas petition filed until the California Supreme Court rejects the petitioner’s final collateral challenge.” 183 F.3d at 1006 (emphasis added). In so stating, we did not require that a petitioner raise the same claims that he raised below, nor did we require that a petitioner pursue remedies at each level of review. Id. Indeed, we recognized that “[tjhere are two methods by which a petitioner may seek review by the California Supreme Court after a habeas petition is denied by the Court of Appeal. The preferred method is. by a petition for review, but the petitioner is also free to file instead an original petition in the California Supreme Court.” Saffold, 250 F.3d at 1266 n. 4 (citing Nino, 183 F.3d at 1006 n. 2). By definition, an original petition does not require that a petitioner raise the same claims that he may have raised below, nor *1018 does it require that a petitioner pursue remedies at each level of review.

Our conclusion that Welch was not required to reallege the same claims in his petition with the California Supreme Court is bolstered by the text of AEDPA’s tolling provision, which states that “[t]he time during which a properly filed application for State post-conviction ... review with respect to the pertinent judgment or claim is pending” is tolled from the limitation period. 28 U.S.C. § 2244 (d)(2) (emphasis added). This language unequivocally provides that, as long as there was a state habeas petition pending that arises out of the same judgment on which the federal petition is based, post-conviction review is “pending,” even if the precise claim presented to the state court that tolled the statute is not realleged in the federal petition. See Tillema v. Long, 253 F.3d 494, 502 (9th Cir.2001) (“AEDPA’s period of limitation is tolled during the pendency of a state application challenging the pertinent judgment, even if the particular application does not include a claim later asserted in the federal habeas petition.”) (footnote omitted). Here, Welch’s separate petitions arose out of the same 1993 judgment, and the California Supreme Court, in deciding his petition on the merits, did not rule Welch’s petition to be untimely or his employment of post-conviction relief procedures to have been otherwise improper. Thus, his application for post-conviction review was “pending” on January 12, 1994, the date on which he filed his first habeas petition, even though the claim he pursued in that petition was not raised in his federal habeas petition. See id. And it remained “pending” until February 24, 1999, when the California Supreme Court rejected Welch’s final challenge on the merits. See Nino, 183 F.3d at 1006 . Consequently, AEDPA’s statute of limitations was tolled from the date of AEDPA enactment until February 24, 1999, making the federal petition that Welch filed in March 1999 timely. We accordingly reverse the judgment of the district court and remand for further proceedings.

REVERSED AND REMANDED.

. In the Superior Court in 1994, Welch attacked the validity of his guilty plea on the ground that his trial counsel had been ineffective in not informing him of the time he must serve in state prison before being eligible for parole. Four years later, in the California Supreme Court, Welch attacked the plea on the grounds that the plea had not been volun-tar)', that his counsel was ineffective for allowing Welch to enter a plea while he was allegedly under the influence of medication, and that his appellate lawyer was ineffective in arguing for withdrawal of the plea.

. The district court reached its decision before we decided Saffold v. Newland, 250 F.3d 1262 (9th Cir.2000), and thus the court was without the benefit of its guidance on the tolling question presented here.

. This requirement refers to " ‘proper use of state court procedures,’ ” Nino, 183 F.3d at 1006 (quoting Barnett v. Lemaster, 167 F.3d 1321, 1323 (10th Cir.1999)), not to the proper filing of the petition. A petition is " 'properly filed’ ” in state court within the meaning of § 2244(d)(2) "when its delivery and acceptance are in compliance with the applicable laws and rules governing filings.” Artuz v. Bennett, 531 U.S. 4, 8 , 121 S.Ct. 361 , 148 L.Ed.2d 213 (2000) (emphasis in original). The State does not dispute that Welch complied with the state courts’ mechanical filing requirements.

. The .State’s argument assumes that if the California Supreme Court denied a petition on the ground of untimeliness, the petitioner would not be entitled to tolling. Nino left that question undecided, however. See Nino, 183 F.3d at 1006 n. 4. We similarly do not address it.

.The California Supreme Court’s order denying Saffold relief stated, in its entirety: “Petition for writ of habeas corpus is DENIED on the merits and for lack of diligence.” Saffold, 250 F.3d at 1267 . Notwithstanding the language concerning the petitioner’s "lack of diligence,” we construed the California Supreme Court’s order as a dismissal on the merits. Id.

. Notably, Nino itself recognized that the question of whether a petitioner's pursuit of state post-conviction relief was "proper” was a question for state courts to resolve, rather than the federal courts. Nino stated: "Because it is not at issue in this case, we express no opinion as to whether tolling pursuant to AEDPA should be applied if the California state courts have dismissed a state habeas petition as untimely because the petitioner engaged in substantial delay in asserting habeas claims.... We also do not ex- ' press an opinion as to whether tolling would be appropriate if the California state courts had determined the state prisoner had not been properly pursuing his state post-conviction remedies.” Nino, 183 F.3d at 1006 n. 4.

. A denial of relief by a state supreme court without comment might be deemed to rest on ‘ a procedural ground if that ground was the only one urged by the state in support of dismissal, or if a lower court whose judgment was under review had made a reasoned decision denying the petition on procedural grounds. See Siripongs v. Calderon, 35 F.3d 1308, 1317 (9th Cir.1994). Neither condition obtains here.