When is an Illinois interlocutory appellant brief due?

Obtain actual Rule 328 supporting-record filing.

Check whether the Appellate Court changed the schedule or dispensed with briefs.

Confirm this is the opening appellant brief rather than the responding or reply stage.

1. Obtain actual Rule 328 supporting-record filing.
2. Exclude the independently established triggering day and count intermediate calendar days under 5 ILCS 70/1.11. A filing, entry, effective service or previously established due date must come from its actual record. Do not substitute one event for another.
3. Check statutory holidays and the proper court’s actual calendar.
4. Complete the particular act in the proper court.

Section 1.11 excludes a final Saturday, Sunday or statutory holiday and consecutive excluded days. Section 17(a) of the Promissory Note and Bank Holiday Act includes Pulaski Day, Good Friday and the general election for members of the House of Representatives. Check proclamations, the proper court’s actual calendar and clerk access separately. The bundled Illinois calendar covers 2026 and 2027.

Fictitious example

Fictitious facts. The supporting record is actually filed and no different briefing order applies. The established event is August 2, 2027. No additional closure or different actual order applies.

Fictitious facts. The appeal classification and triggering event are independently established. No additional closure, court order or unmodeled restart is assumed.

The court may change or dispense with briefs

Rule 307(c) makes its schedule subject to an Appellate Court order changing it or directing that no briefs be filed.

The responding stage uses actual appellant filing

Rule 307(c) requires the appellee brief and any supplemental supporting record with proof within seven days from actual appellant-brief filing.

The optional reply uses actual appellee filing

Rule 307(c) permits the appellant to serve and file a reply within seven days from actual appellee-brief filing. This differs from ordinary due-date counting.

• The calculator does not decide appealability, disputed facts, sufficiency of a filing or whether the court grants relief.
• Check the governing edition and actual orders. A current rule does not establish every historical appeal’s timetable.

• Obtain actual Rule 328 supporting-record filing.
• Check whether the Appellate Court changed the schedule or dispensed with briefs.
• Confirm this is the opening appellant brief rather than the responding or reply stage.
• Rule 307(c) makes its schedule subject to an Appellate Court order changing it or directing that no briefs be filed.
• Rule 307(c) requires the appellee brief and any supplemental supporting record with proof within seven days from actual appellant-brief filing.
• Rule 307(c) permits the appellant to serve and file a reply within seven days from actual appellee-brief filing. This differs from ordinary due-date counting.
• File the opening brief with the Appellate Court and proof of service. Follow the incorporated Rules 341 through 344 requirements and any actual order. Preserve actual supporting-record and brief filing receipts. Use the proper clerk and required filing format. Rule 9 ordinarily requires electronic filing in civil cases, subject to its exceptions and exemptions. Rule 9(f) ordinarily uses submission before midnight in the court time zone, unless a statute, rule or order sets a particular time. A submission when the clerk is closed is ordinarily stamped on the next open day. Current Rule 9(f) provides separate five-court-day motions for a rejected filing or qualifying technical failure; establish the actual notice, failure, corrected document and required proof. Rule 373 ordinarily uses actual receipt, with its mail or carrier exception limited to filings excepted or exempt from electronic filing. Its carrier branch requires delivery for receipt within three business days and Rule 12(b) proof. Filing and service remain separate acts. Use Rule 11’s applicable service method and file Rule 12 proof. Rule 12(c) makes electronic or personal delivery service effective on its stated day, mail service complete four days after mailing, and third-party carrier service complete on the third court day after delivery to the carrier. Establish effective service before using a service-triggered calculator. A rule requiring personal or email service cannot be replaced with ordinary mail.