10 Business Days Ago
10 business days ago (October 14, 2026) is:
Tuesday, September 29, 2026
That is 15 calendar days, skipping 4 weekend days and 1 US federal holiday.
Based on US federal holidays. Use the calculator below to change country.
Step back 10 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.
Ten business days back is two full work weeks, and it is the most common retrospective compliance question in US consumer finance: did the institution answer inside the window it was given? Two federal clocks run on exactly this count. To set a ten-day deadline rather than audit one, use 10 business days from today.
Auditing a ten-business-day clock after it has run
Regulation E is the one most people meet. Under 12 CFR 1005.11(c)(1) a financial institution must "determine whether an error occurred within 10 business days of receiving a notice of error". Checking that after the fact needs two dates and a count in the right direction: take the date the determination was actually made, count back ten business days on the institution's calendar, and see whether the notice of error arrived on or after that date. If it arrived earlier, the ten-day window had already closed and paragraph (c)(2) required a provisional credit instead.
The Privacy Act runs a second ten-day clock with older drafting. Under 5 U.S.C. 552a(d)(2)(A) an agency must acknowledge an amendment request "not later than 10 days (excluding Saturdays, Sundays, and legal public holidays) after the date of receipt of such request". The statute never uses the phrase business days; the parenthetical exclusion is what makes it one. When you are reconstructing a period from an older provision, that exclusion language is the thing to look for, because a period written this way and a period written in calendar days can differ by four days at this length.
Federal holidays sitting inside these two work weeks
| Public holiday | Fell on | Day of week |
|---|---|---|
| Columbus Day | October 12, 2026 | Monday |
Two work weeks of lookback, measured
The calendar span is the figure that decides most disputes about a ten-day window, because it is where the holidays show up.
| What was counted | Figure |
|---|---|
| Total span in calendar days | 15 days |
| Working weeks behind us | 2 weeks |
| Elapsed weeks on the wall calendar | 2.1 weeks |
| Roughly how many months back | 0.5 months |
| Weekend days inside the lookback | 4 |
| Public holidays inside the lookback | 1 |
| Weekday of the earlier date | Tuesday |
Where a ten-day lookback earns its keep
Beyond the two federal clocks, ten business days is the reach-back most operational reviews settle on. These are conventions, so the governing document still decides.
- Chargeback and dispute file reviews, which follow the Regulation E timetable even for transactions the regulation does not cover.
- Support queues checking which tickets are still inside a two-week first-response commitment and which have quietly aged out of it.
- Vendor reconciliations, where ten business days is short enough that the paperwork still exists and long enough to survive one public holiday.
- Invoice-approval audits that sit upstream of a payment term. Once you have the approval date, the Net 30 calculator handles the payment leg.
Ten business days back across seven other calendars
Each row recounts the same ten days against that country's own calendar. A row that matches the US date is a window holding the same number of closures, which is not the same as holding the same holidays.
| National calendar | Points back to | Holidays in the span | Against the US date |
|---|---|---|---|
| United Kingdom | September 30, 2026 | 0 | 1 day more recent |
| Canada | September 28, 2026 | 2 | 1 day further back |
| Germany | September 30, 2026 | 0 | 1 day more recent |
| Spain | September 29, 2026 | 1 | Identical |
| India | September 29, 2026 | 1 | Identical |
| Japan | September 29, 2026 | 1 | Identical |
| Mexico | September 30, 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.
- 12 CFR 1005.11(c)(1), (c)(2) (opens in a new tab) (Office of the Federal Register (eCFR))
- 5 U.S.C. 552a(d)(2)(A) (opens in a new tab) (U.S. Government Publishing Office)
- 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 10 business days forward from today. 10 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 |
|---|---|
| 5 business days ago | October 6, 2026 |
| 7 business days ago | October 2, 2026 |
| 14 business days ago | September 23, 2026 |
| 15 business days ago | September 22, 2026 |
| 20 business days ago | September 15, 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.