Rebuttal expert witness disclosures are due thirty (30) days after receiving the other parties’ expert witness disclosures. Fed. R. Civ. P. 26(a)(2)(D)(ii).
Links to Deadline Calculator Pages for Pertinent Federal Court Deadlines:
Answers to Counterclaims and Crossclaims
Reply to an Answer (If Ordered)
Effect of a Motion on the Answer Deadline
Responses to Discovery Requests
Affidavits in Opposition to Motions