Federal Register Table of Effective Dates

What the table is for

The Federal Register Table of Effective Dates & Time Periods is a reader aid for turning phrases such as "30 days after publication" into calendar dates.

The Office of the Federal Register uses the table to compute certain dates, including effective dates and comment deadlines, that appear in Federal Register documents. It is especially useful when a document is on public inspection before publication, because public inspection copies may contain calculated dates that are inserted after filing.

Use the table as a date-calculation aid, not as a substitute for the document itself. The controlling starting point is the DATES section of the Federal Register document, read with any later correction, extension, delay, withdrawal, or reopening published by the agency. FederalRegister.gov is useful for searching and reading, but it tells legal researchers to verify against an official edition, including the official PDF linked from the document. For live monitoring, RegWatch can watch new rules and public comment deadlines from the free watch form at RegWatch.

Effective dates are not comment deadlines

A Federal Register issue can include proposed rules, final rules, direct final rules, interim final rules, and notices. Each can use dates differently.

• Proposed rules: A proposed rule, often called an NPRM, explains what an agency is considering and invites public comment. The DATES and ADDRESSES sections tell readers when comments are due and how to submit them. OFR guidance says agencies often use 30 to 60 day comment periods, but the period can be shorter or longer when the agency has a reason.
• Final rules: A final rule states an effective date for the regulatory change. Under the Administrative Procedure Act, substantive final rules generally may not take effect less than 30 days after publication unless an exception applies, such as good cause, a rule that grants or recognizes an exemption, or an interpretive rule or policy statement. OFR guidance also describes a 60 day delayed effective date for significant rules under Executive Order 12866 and major rules under congressional review procedures, with emergency exceptions for major rules.
• Direct final and interim final rules: A direct final rule usually says it will take effect on a stated date unless the agency receives significant adverse comments. An interim final rule can take effect before the usual notice-and-comment process is complete, but the agency must explain the legal basis and usually asks for post-publication comments.
• Notices: Notices can announce hearings, meetings, grants, environmental reviews, agency actions, or other public information. Some notices request comments or list deadlines, but notices normally do not amend the Code of Federal Regulations.
• CFR changes: Final rules that amend binding regulatory text include instructions for changing the Code of Federal Regulations. The Federal Register publishes the legal document, and the CFR organizes current federal regulations by subject.

How to calculate a Federal Register date

Start with the official publication date, then follow the wording in the DATES section exactly.

• Find the document on FederalRegister.gov, open the DATES section, and check the linked official PDF if the date matters for legal or compliance work.
• If the document says "30 days after publication," do not count the publication date as day one. Count forward from the next calendar day, then compare your result with the Federal Register table or the date printed in the final published document.
• If the document names a specific date, use that date unless a later Federal Register document changes it. Do not replace a stated date with your own count.
• If the endpoint falls on a weekend or federal holiday, read the document and the official table carefully. Some deadlines move under general timing rules, while some documents state a fixed date.
• For comments, use the submission method named in the Federal Register document. Many rulemakings link to Regulations.gov, but some documents give another address, docket system, or special instruction.
• For public inspection documents, treat the file as useful early notice. Verify the published Federal Register version, and check the same docket, RIN, CFR part, and agency page for later changes before making a decision.

RegWatch is built for this workflow: track an agency, topic, RIN, docket, CFR part, or keyword, then review new Federal Register items before the deadline passes. Related explainers are available at RegWatch guides.