When must New York class certification be requested?

Identify every person named as a defendant and establish each responsive-pleading period, service completion, timely motion and valid extension.

Use the date by which all those periods have expired. The first answer, the last answer’s filing date and complaint filing do not automatically establish that event.

Responsible actor. The plaintiff seeking to maintain the action as a class action. The independently established last responsive-pleading expiry for all named defendants. No unresolved service method, dismissal-motion extension, different order or granted time extension.

1. Identify every person named as a defendant and establish each responsive-pleading period, service completion, timely motion and valid extension.
2. Use the date by which all those periods have expired. The first answer, the last answer’s filing date and complaint filing do not automatically establish that event.
3. Exclude the established trigger day and count 60 calendar days forward. Intermediate weekends and public holidays remain in the count. General Construction Law 25-a permits the next succeeding business day for a closed final statutory day.
4. Move for the order determining class maintenance. Preserve service making the noticed motion under CPLR 2211, required court filing and the evidence addressing statutory class requirements.

General Construction Law 20 excludes the event day. Its closed-intervening-day exception applies to an exact two-day period, not to a one-day period. Intermediate weekends and public holidays count in other calendar-day periods. Section 25-a expressly includes statutory periods before which an act is due and permits the next succeeding business day for a closed final day. Rollover can place a backward boundary on the return date; preserve the stated hour and actual court directions. Roberts, a separately identified uncorrected Supreme Court decision concerning opposition to a cross-motion, applied section 25-a to a Sunday boundary before a Monday return. It is corroboration of that final-day treatment, not a different universal briefing rule.

The independently derived 2026 and 2027 calendar follows General Construction Law 24 and Election Law 8-100. It includes Lincoln’s Birthday, Flag Day on the second Sunday in June, Juneteenth, general election day and the other specified holidays. Section 24 adds the next day when a listed holiday falls on Sunday, except Flag Day. A Saturday holiday is not automatically observed on Friday under this provision. Additional appointed holidays and actual court or system closures require separate proof.

These calculators cover established events and final dates within January 1, 2026 through December 31, 2027. They require the disclosed statutory branch, independently valid service, no unsupported method addition, no different actual court order and no additional closure. Backward presets require an actual open-day return date. Earlier editions, the 2020 executive-order toll and dates beyond the retained calendar require separate review and receive no computed or paid date. This software coverage boundary does not establish that an actual act is late.

Fictitious example

The independently established last responsive-pleading expiry for all named defendants. No unresolved service method, dismissal-motion extension, different order or granted time extension. Fictitious established event on the input date. The independently established last responsive-pleading expiry for all named defendants. No unresolved service method, dismissal-motion extension, different order or granted time extension.

Fictitious established facts. The result does not prove valid service, the required exception, actual filing, preserved jurisdiction or a granted court extension. The applicable hour and actual court directions remain separate checks.

All named defendants

Section 902 uses expiry for all persons named as defendants. A different defendant’s earlier response cannot supply the final trigger.

Class prerequisites

CPLR 901 requires the stated numerosity, commonality and predominance, typicality, adequate representation and superiority conditions. Timing does not prove those elements.

Certification considerations

Section 902 identifies interests in separate actions, practicality, pending litigation, forum desirability and management difficulties. Preserve the facts supporting the requested order.

Extension requires actual authority

CPLR 2004 permits extensions on good cause except where otherwise expressly prescribed. Lack of prejudice is not an automatic sixty-day addition.

Motion making

CPLR 2211 identifies service of the noticed motion as the making event. Required filing remains a separate act.

Edition and calendar coverage

These calculators cover established events and final dates within January 1, 2026 through December 31, 2027. They require the disclosed statutory branch, independently valid service, no unsupported method addition, no different actual court order and no additional closure. Backward presets require an actual open-day return date. Earlier editions, the 2020 executive-order toll and dates beyond the retained calendar require separate review and receive no computed or paid date. This software coverage boundary does not establish that an actual act is late.

• The independently established last responsive-pleading expiry for all named defendants. No unresolved service method, dismissal-motion extension, different order or granted time extension.
• The selected date supplies only the disclosed statutory branch. It does not validate the facts or authorize an unmodeled alternative.

• Identify every person named as a defendant and establish each responsive-pleading period, service completion, timely motion and valid extension.
• Use the date by which all those periods have expired. The first answer, the last answer’s filing date and complaint filing do not automatically establish that event.
• Move for the order determining class maintenance. Preserve service making the noticed motion under CPLR 2211, required court filing and the evidence addressing statutory class requirements.
• Section 902 uses expiry for all persons named as defendants. A different defendant’s earlier response cannot supply the final trigger.
• CPLR 901 requires the stated numerosity, commonality and predominance, typicality, adequate representation and superiority conditions. Timing does not prove those elements.
• Section 902 identifies interests in separate actions, practicality, pending litigation, forum desirability and management difficulties. Preserve the facts supporting the requested order.
• CPLR 2004 permits extensions on good cause except where otherwise expressly prescribed. Lack of prejudice is not an automatic sixty-day addition.
• CPLR 2211 identifies service of the noticed motion as the making event. Required filing remains a separate act.
• In the applicable Supreme Court NYSCEF program, rule 202.5-b(d)(3)(i) permits transmission day or night and identifies recorded transmission with required fee information or permitted actual later payment as the filing event. Interlocutory service under (f)(2) depends on the transmitted NYSCEF notification reaching the proper participating addresses. Filing initiating papers does not itself establish defendant service. Under (h)(2), the clerk’s entry notification is not party service of notice of entry. Preserve the actual document, proof, timestamp, fee event, recipients and court requirements. Paper filing requires the applicable office procedure and receipt. The qualifying technical-failure and emergency hard-copy branches in (i) and (d)(1)(iii) require their actual conditions and later electronic filing; they are not presumed here.