US Data Release and Rate Reset Dates: Reference Index

A payroll print, a savings bond reset, a lease escalation and a central bank decision all land on a known date. What they rarely land on is the date that matters: the release date is not the reference period, and the reference period is not the date the number takes effect. This index collects the Eco3min reference pages built around those recurring events, grouped not by topic but by the kind of gap that produces the mistake — release timing, reference-period lag, and formula construction. Each page answers the date or level question first, then explains the rule that generates it.

The pages, grouped by type of gap

Release timing

The number lands at a fixed moment. Which moment depends on the agency, the calendar and, for anyone reading from outside the United States, the time of year.

US economic data release calendar — most federal statistical releases share a single embargo time in Eastern Time, but some widely followed indicators do not, and arrive later in the American morning and afternoon. The page also covers the second gap: the distance between the publication date and the month or quarter the figure actually measures.

Is the US stock market open today — session hours, exchange holiday closures — which do not line up exactly with the federal holiday calendar — early closes, and a bond market calendar that differs from the equity one.

Fed blackout period calendar — the window in which Federal Reserve officials stop commenting on monetary policy is not read off the meeting calendar directly. It opens on the second Saturday before the meeting and closes the day after the meeting ends. Scheduled public remarks therefore fall outside that window.

US–Europe daylight saving gap — the United States shifts on the second Sunday in March and the first Sunday in November; the European Union shifts on the last Sunday in March and the last Sunday in October. For a few weeks each year the usual offset between the two zones does not hold, which matters for anyone scheduling around a US release from Europe or trading a European session against a US one.

Reference-period lag

The figure exists, but the one that applies is not the one most recently published.

Social Security COLA announcement and formula — the adjustment is announced in the autumn and applies to benefits payable from the following January. It is computed from the CPI-W, not the headline CPI-U, and it compares the third quarter of the current year with the third quarter of the last year in which an adjustment was actually determined, which is not mechanically the year before.

CPI escalation clauses in commercial leases — the Bureau of Labor Statistics publishes several CPI series, and the one a contract names changes the result. The publication lag then decides which reference month is available on the adjustment date written into the lease.

Formula construction

The published level is the output of a calculation whose inputs sit elsewhere, and sometimes of a step that is not a calculation at all.

Series I Bonds rate reset dates — Treasury sets new rates each May 1 and November 1, but the composite rate is not the sum of its two parts, and the six-month period that governs an individual bond runs from its issue month rather than from the reset date. Two bondholders can hold the same instrument and be earning different rates on the same day.

WSJ Prime Rate current level — the prime rate quoted across US consumer lending is not published by a regulator. It comes from a survey of large US banks rather than from a regulator, and its changes have followed Federal Reserve decisions rather than a publication calendar of its own.

Why the gap is the norm rather than the exception

The three groups above have different causes and the same consequence: the figure or the hour being read is not the one that applies.

Release timing is a question of institutional practice and statute. Embargo hours are set by the issuing agency; market sessions are set by the exchange; clock changes are set by national law, and the United States and the European Union legislate theirs separately. Nothing obliges those calendars to agree, and for several weeks a year they do not.

Reference-period lag is a question of measurement. A statistical agency observes a period, processes it, and then publishes: the release necessarily follows the period it describes. Once a contract or a benefit is indexed to that series, a second question arrives on top of the first — not what the latest figure is, but which figure was available, or specified, on the adjustment date that governs.

Formula construction is a question of design. An indexed rate applies to a forward period a calculation fed by backward data. Several of these mechanisms then add a discretionary step, or a rounding and combination rule that is not intuitive. Reading the formula output as the applicable level is a common error, and a categorical one rather than a rounding one.

What these pages correct

Three mistakes recur, one per group. Converting a US release time once and treating it as settled for the year. Reading a statistic as a description of the month it appears in. Applying the most recently published index instead of the one the contract designates. None of the three is fixed by looking up a number; each is fixed by understanding the rule that produces the number, which is what each page above sets out to do.

These mechanisms sit inside a wider frame, covered in the sections on macro-financial regimes and research and data. Ongoing coverage of the same releases runs through Macro Watch.

Frequently asked questions

Last updated — 21 August 2026