When may a California appellant file a reply brief?

Actual filing of the respondent's brief

Retain the reviewing court filing record. Receipt of a served copy and timely postal dispatch are different from the filing date.

Responsible actor. The appellant choosing to file a reply. Use the actual filing date of the respondent's brief, without an altered period or combined cross-appeal briefing order.

1. Use the actual filing date of the respondent's brief, without an altered period or combined cross-appeal briefing order.
2. Exclude the established event and count 20 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. If filing a reply, serve and file it in the reviewing court and preserve the required copies and confirmations. No further brief may be filed without court permission.

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 the actual filing date of the respondent's brief, without an altered period or combined cross-appeal briefing order. 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.

Timely stipulated or court extension

Under rule 8.212(b), parties may stipulate to up to sixty days per brief period, subject to stated statutory and prior-extension exceptions. File the signed stipulation before the brief is due. A further application must satisfy the stated good-cause conditions.

Both appellant and respondent

Rule 8.216 requires a proposed and court-ordered briefing sequence when a party has both roles. The ordinary single-role preset does not calculate that ordered sequence.

Further briefs

The appellant may file the identified reply, but further briefing requires the court's permission under rule 8.212(a)(3).

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 the actual filing date of the respondent's brief, without an altered period or combined cross-appeal briefing order.
• The base calculation does not resolve the excluded comparisons or establish that the responsible actor completed the required act.

• Actual filing of the respondent's brief
• Retain the reviewing court filing record. Receipt of a served copy and timely postal dispatch are different from the filing date.
• Under rule 8.212(b), parties may stipulate to up to sixty days per brief period, subject to stated statutory and prior-extension exceptions. File the signed stipulation before the brief is due. A further application must satisfy the stated good-cause conditions.
• Rule 8.216 requires a proposed and court-ordered briefing sequence when a party has both roles. The ordinary single-role preset does not calculate that ordered sequence.
• The appellant may file the identified reply, but further briefing requires the court's permission under rule 8.212(a)(3).
• If filing a reply, serve and file it in the reviewing court and preserve the required copies and confirmations. No further brief may be filed without court permission.
• 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.