15 Business Days Ago
15 business days ago (October 14, 2026) is:
Tuesday, September 22, 2026
That is 22 calendar days, skipping 6 weekend days and 1 US federal holiday.
Based on US federal holidays. Use the calculator below to change country.
Step back 15 business days from today, skipping weekends and US federal holidays, and you get the date above. The useful version of this question is usually about the start of a period that has already run: when a notice arrived, when goods were delivered, whether an event still sat inside a window that has since closed. The result card adjusts to your local calendar once the page loads, and the calculator below lets you replace today with whatever fixed date you are working back from.
Fifteen business days back is three work weeks. It is worth saying plainly at the top: no federal statute or regulation we can point to sets a fifteen-business-day period, and this page used to claim one. The forward page carries the same correction from the other direction at 15 business days from today.
A claim this page used to make, and what replaced it
Until this revision the copy here described fifteen business days as "the lookback window for many regulatory disclosure questions about recent material changes". That sentence named no rule, and we could not find one behind it. It is gone rather than reworded, because a vague version of an unverifiable claim is worse than none: it survives a reader's scepticism without ever having earned it.
The nearest real fifteen sits in federal EEO practice. Under 29 CFR 1614.106(b) a formal complaint "must be filed within 15 days of receipt of the notice" issued at the end of counselling. Reading it backward is the useful direction: a complaint filed on a given day tells you the notice reached the complainant no more than fifteen days earlier, which is how a timeliness dispute gets framed. But 29 CFR 1614.604(a) settles the counting method in one line: "All time periods in this part that are stated in terms of days are calendar days unless otherwise stated."
Three work weeks of reach, from the reference date
| What was counted | Figure |
|---|---|
| Total span in calendar days | 22 days |
| Working weeks behind us | 3 weeks |
| Elapsed weeks on the wall calendar | 3.1 weeks |
| Roughly how many months back | 0.7 months |
| Weekend days inside the lookback | 6 |
| Public holidays inside the lookback | 1 |
| Weekday of the earlier date | Tuesday |
How to use this page honestly
Fifteen business days is a real unit of working time and a poor guess at a legal period. If a document you are reconstructing says fifteen days, find out which kind before you count: a calendar fifteen reaches back about half a month, while fifteen business days reaches back the span shown in the table above, and the gap between the two is the whole argument in a timeliness fight.
Where the source does say business days, this page is exactly right, and three work weeks is a common private-sector reach-back for approval audits and quality sampling. We would rather label that as convention than dress it up as regulation.
Public holidays inside these three work weeks
| Public holiday | Fell on | Day of week |
|---|---|---|
| Columbus Day | October 12, 2026 | Monday |
Fifteen business days back elsewhere
Three work weeks measured against seven other national calendars. The spread between the rows is a fair picture of how much a holiday calendar can move a medium-length lookback.
| National calendar | Points back to | Holidays in the span | Against the US date |
|---|---|---|---|
| United Kingdom | September 23, 2026 | 0 | 1 day more recent |
| Canada | September 21, 2026 | 2 | 1 day further back |
| Germany | September 23, 2026 | 0 | 1 day more recent |
| Spain | September 22, 2026 | 1 | Identical |
| India | September 22, 2026 | 1 | Identical |
| Japan | September 17, 2026 | 4 | 5 days further back |
| Mexico | September 23, 2026 | 0 | 1 day more recent |
What this page is built on
Read and confirmed on September 7, 2026. Several periods below run in calendar days even though the page counts in working days, and each one says so where it appears rather than in a footnote.
- 29 CFR 1614.106(b) (opens in a new tab) (Office of the Federal Register (eCFR))
- 29 CFR 1614.604(a), (g) (opens in a new tab) (Office of the Federal Register (eCFR))
- 31 CFR 800.203, definition of business day (opens in a new tab) (Office of the Federal Register (eCFR))
- Federal holidays (opens in a new tab) (U.S. Office of Personnel Management)
The same count, running the other way
If you need to set a deadline rather than reconstruct one, the sister page counts 15 business days forward from today. 15 business days from today.
Lookbacks of a similar length
All measured back from the reference date October 14, 2026, with US federal holidays removed. Each value has its own page and adjusts to your local today there.
| Length of lookback | Points back to |
|---|---|
| 7 business days ago | October 2, 2026 |
| 10 business days ago | September 29, 2026 |
| 14 business days ago | September 23, 2026 |
| 20 business days ago | September 15, 2026 |
| 21 business days ago | September 14, 2026 |
| 25 business days ago | September 8, 2026 |
For informational purposes only
This calculator provides general estimates based on business day counting rules. It does not constitute legal advice. Deadlines in legal, regulatory, or contractual matters may be subject to jurisdiction-specific rules, court orders, or statutory exceptions. Always verify critical deadlines with a qualified professional.