When does the ordinary rebuttal expert disclosure period begin?

Identify the other party’s actual subsection (B) or (C) disclosure and subject matter.

Establish whether the proposed evidence is intended solely to contradict or rebut that same subject matter.

Read any actual stipulation or court-ordered schedule and establish effective disclosure service and method.

1. Identify the actual actor, pleading and required act.
2. Establish the specified event and applicable order.
3. Resolve the material conditions. This guide publishes no calculated date.
4. Check final-day conditions and preserve service and filing evidence separately.

Establish effective service and apply Rule 6(a) to the base period. Rule 6(d) adds three days only to a specified period after being served under Rule 5(b)(2)(C), (D) or (F). Compute the underlying Rule 6(a) expiry first, then add three days and recheck the final day. Electronic service under (E) and office or dwelling delivery under (B) do not qualify. Filing, judgment entry, one’s own service and backward lead times do not automatically attract the addition. This guide does not select a service method or compute a date.

Rule 6(a) excludes the operative event and counts intermediate calendar days. A final Saturday, Sunday or legal holiday moves forward. Rule 6(a)(6) includes federal and President or Congress declared holidays, plus state-declared holidays for forward periods in the district. Qualifying clerk inaccessibility matters separately for filing.

The actual disclosure, service method, solely rebuttal condition and schedule are material. The isolated single-date preset does not establish them or publish a date.

Solely rebuttal and same subject

Subsection (D)(ii) requires evidence intended solely to contradict or rebut the same subject matter identified in the qualifying other-party disclosure.

Order or stipulation

Rule 26(a)(2)(D) gives priority to the court-ordered times and sequence and applies these defaults absent a stipulation or court order.

Disclosure service

Rule 26(a)(4) ordinarily requires service. Identify the actual method and assess whether Rule 6(d)’s after-being-served condition is met. Rule 6(d) adds three days only to a specified period after being served under Rule 5(b)(2)(C), (D) or (F). Compute the underlying Rule 6(a) expiry first, then add three days and recheck the final day. Electronic service under (E) and office or dwelling delivery under (B) do not qualify. Filing, judgment entry, one’s own service and backward lead times do not automatically attract the addition.

• This page does not establish effective service, merits, compliance or an actual court grant.
• Service and filing are different acts. Verify both when required.

• Identify the other party’s actual subsection (B) or (C) disclosure and subject matter.
• Subsection (D)(ii) requires evidence intended solely to contradict or rebut the same subject matter identified in the qualifying other-party disclosure.
• Rule 26(a)(2)(D) gives priority to the court-ordered times and sequence and applies these defaults absent a stipulation or court order.
• Rule 26(a)(4) ordinarily requires service. Identify the actual method and assess whether Rule 6(d)’s after-being-served condition is met. Rule 6(d) adds three days only to a specified period after being served under Rule 5(b)(2)(C), (D) or (F). Compute the underlying Rule 6(a) expiry first, then add three days and recheck the final day. Electronic service under (E) and office or dwelling delivery under (B) do not qualify. Filing, judgment entry, one’s own service and backward lead times do not automatically attract the addition.
• Rule 26(a)(4) ordinarily requires disclosures to be written, signed and served. Establish effective service of the qualifying disclosure and the actual rebuttal content. For filing, Rule 6(a)(4) ordinarily uses midnight in the court’s time zone for electronic filing and scheduled clerk closing for other filing. A statute, local rule or order may set another time. These filing cutoffs do not establish effective service by every method. Preserve evidence of each actual required act.