37 CFR § 220.4 - Timing.

---
identifier: "/us/cfr/t37/s220.4"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "37 CFR § 220.4 - Timing."
title_number: 37
title_name: "Patents, Trademarks, and Copyrights"
section_number: "220.4"
section_name: "Timing."
chapter_name: "U.S. COPYRIGHT OFFICE, LIBRARY OF CONGRESS"
subchapter_number: "B"
subchapter_name: "COPYRIGHT CLAIMS BOARD AND PROCEDURES"
part_number: "220"
part_name: "GENERAL PROVISIONS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "17 U.S.C. 702, 1510."
regulatory_source: "87 FR 30075, May 17, 2022, unless otherwise noted."
cfr_part: "220"
---


# 220.4 Timing.

When the start or end date for calculating any deadline set forth in this subchapter falls on a weekend or a Federal holiday, the start or end date shall be extended to the next Federal workday. Any document subject to a deadline must be either submitted to the Board's electronic filing system (eCCB) by 11:59 p.m. Eastern Time on the date of the deadline or dispatched by the date of the deadline.