When is a California Supreme Court petition for review due?

Actual finality of the Court of Appeal decision

Review decision type, publication, judgment-changing modification, consent, rehearing grant and emergency orders. Rule 8.500(e)(1) does not extend finality because the clerk office is closed.

Responsible actor. The party seeking California Supreme Court review. Use legally established actual finality in the Court of Appeal. Do not derive it by rolling an opinion-filing anniversary to the next court day.

1. Use legally established actual finality in the Court of Appeal. Do not derive it by rolling an opinion-filing anniversary to the next court day.
2. Exclude the established event and count 10 calendar days forward under CCP 12 and rule 1.10. Intermediate weekends and holidays count. A final judicial holiday moves to the next open day under CCP 12a. Check actual additional closures under CCP 12b.
3. Check the actual judicial holidays, closures and statutory or court-ordered qualifications.
4. Serve and file the petition in the Supreme Court. Rule 8.500(f) also identifies superior court clerk and Court of Appeal clerk service, with its electronic-filing qualification.

CCP 12 excludes the triggering day for ordinary day periods. CCP 12a supplies the final judicial-holiday adjustment, including Saturdays and the CCP 135 holidays. CCP 12b addresses qualifying whole-day office closures. Court-day periods exclude intermediate Saturdays, Sundays and judicial holidays. Calendar-day periods include intermediate closed days. Rule 1.11 supplies Friday observance of a Saturday judicial holiday and Monday observance of a Sunday judicial holiday. The calendar includes Lincoln Day, March 31, Juneteenth, Native American Day and Thanksgiving Friday. It excludes Columbus Day and Good Friday as ordinary full judicial holidays. The observed New Year holiday on December 31, 2027 is confirmed in the county schedule. Actual additional closures require separate evidence.

Establish the actual service method and legally completed event. The tax-cost preset is confined to personal service; rule 3.1700(b)(1) expressly recognizes CCP 1013 mail and CCP 1010.6 electronic additions. Filing-triggered brief and review-answer clocks do not begin merely with service. CCP 1013 and 1010.6 exclude their stated additions for a notice of appeal. A summons-service event and an appellate filing event have distinct requirements. These presets do not calculate excluded service or combined procedural branches.

Official 2026 Rules of Court were reviewed. Publication coverage begins January 1, 2026 and assumes the reviewed branch still governs the input. Displayed final dates use the independently retained 2026 and 2027 California judicial calendar. Earlier or amended editions, emergency orders and actual additional closures require separate review. A closed backward statement boundary receives no date because its exact adjustment is not implemented. Source guides for combined appeal clocks, stipulated responses, cost memoranda and decision finality supply no computed or paid date. These software coverage boundaries do not establish that an actual filing is late.

Fictitious example

Use legally established actual finality in the Court of Appeal. Do not derive it by rolling an opinion-filing anniversary to the next court day. Only the disclosed branch and established event apply, with no altered order, eligible service addition or additional closure.

Fictitious facts within the stated coverage. This is the disclosed component, not a determination of legal accrual, effective service, court action or entitlement. No tolling, different service addition, altered order or additional closure is assumed. Closed unsupported base branches receive no computed date.

No ordinary petition extension

Rule 8.500(e)(2) bars extension of the petition period. Chief Justice relief from late filing is distinct, conditional and not automatic.

Premature petition

A petition filed before finality is accepted and deemed filed the day after finality under subsection (e)(3).

Own-motion review window

Without a petition, rule 8.512(c)(1) ordinarily allows thirty days after finality, with timely ordered extensions no later than ninety days. Ninety days is not an automatic window in every case.

Rehearing does not automatically postpone

An unresolved rehearing petition is deemed denied at finality. Only an actual grant has the stated vacating effect.

Actual emergency order

Rule 8.66 permits specified emergency tolling or extensions and renewals. Check the order's scope and dates; the rule does not add time merely because an emergency occurred.

Service methods and distinct statutory additions

Establish the actual service method and legally completed event. The tax-cost preset is confined to personal service; rule 3.1700(b)(1) expressly recognizes CCP 1013 mail and CCP 1010.6 electronic additions. Filing-triggered brief and review-answer clocks do not begin merely with service. CCP 1013 and 1010.6 exclude their stated additions for a notice of appeal. A summons-service event and an appellate filing event have distinct requirements. These presets do not calculate excluded service or combined procedural branches.

Edition and calendar coverage

Official 2026 Rules of Court were reviewed. Publication coverage begins January 1, 2026 and assumes the reviewed branch still governs the input. Displayed final dates use the independently retained 2026 and 2027 California judicial calendar. Earlier or amended editions, emergency orders and actual additional closures require separate review. A closed backward statement boundary receives no date because its exact adjustment is not implemented. Source guides for combined appeal clocks, stipulated responses, cost memoranda and decision finality supply no computed or paid date. These software coverage boundaries do not establish that an actual filing is late.

• Use legally established actual finality in the Court of Appeal. Do not derive it by rolling an opinion-filing anniversary to the next court day.
• The base calculation does not resolve the excluded comparisons or establish that the responsible actor completed the required act.

• Actual finality of the Court of Appeal decision
• Review decision type, publication, judgment-changing modification, consent, rehearing grant and emergency orders. Rule 8.500(e)(1) does not extend finality because the clerk office is closed.
• Rule 8.500(e)(2) bars extension of the petition period. Chief Justice relief from late filing is distinct, conditional and not automatic.
• A petition filed before finality is accepted and deemed filed the day after finality under subsection (e)(3).
• Without a petition, rule 8.512(c)(1) ordinarily allows thirty days after finality, with timely ordered extensions no later than ninety days. Ninety days is not an automatic window in every case.
• An unresolved rehearing petition is deemed denied at finality. Only an actual grant has the stated vacating effect.
• Rule 8.66 permits specified emergency tolling or extensions and renewals. Check the order's scope and dates; the rule does not add time merely because an emergency occurred.
• Serve and file the petition in the Supreme Court. Rule 8.500(f) also identifies superior court clerk and Court of Appeal clerk service, with its electronic-filing qualification.
• Under rule 8.25, filing ordinarily uses actual clerk receipt. Specified briefs and review documents have a timely priority or express mail or overnight carrier dispatch exception; the exception does not change the actual filing date used by a later filing-triggered period. Ordinary mail does not receive that exception. Custodial mailing has a separately stated exception. Rule 8.77 supplies electronic receipt and filing confirmations, next-court-day treatment after 11:59 p.m. and good-cause relief for failed transmission. Preserve receipt, filing and service proof. Failure relief is not automatic.