30 Days Ago
The exact date 30 days ago, counted live backwards from today — with the business days and US federal holidays inside the span.
The count is fixed at 30 days back on this page. Need a different count? The Days From Today Calculator counts any number of days or months, forwards or back.
Nearby Counts Back From the Same Start Date
| Count | Date |
|---|---|
| 7 days ago | — |
| 14 days ago | — |
| 21 days ago | — |
| 28 days ago | — |
| 45 days ago | — |
| 60 days ago | — |
| 90 days ago | — |
How Counting 30 Days Back Works
The count walks the real calendar one day at a time in reverse from your start date: today itself is day zero, yesterday is one day ago, and the walk crosses month ends — and February 29 in leap years — exactly as the calendar does. That is why 30 days ago is not the same as a fixed number of months ago: months run 28 to 31 days, while this count is always exactly 30 days. The panel above also reads the span in business days (skipping Saturdays and Sundays) and lists every US federal holiday inside it, because lookback windows in reports and paperwork usually run on working days.
Worked Example: 30 Days Before Monday, November 9, 2026
Starting on Monday, November 9, 2026 and counting 30 days back lands on Saturday, October 10, 2026. Of the 30 days in the span, 20 are business days and 10 fall on weekends, and the span is 4 weeks and 2 days of counting. The result date is day 283 of 2026. US federal holidays inside it: Columbus Day (October 12, 2026).
Why '30 Days Ago' Is the Default Lookback
Looking backwards, 30 days is the window the software world settled on: analytics dashboards open on "last 30 days", banking apps summarise the last 30 days, and receipts, trials and short guarantees are checked against it. It is the mirror image of the 30-day deadline — the same count, run in reverse — and it inherits the same trap: 30 days is not one month, so "last 30 days" and "since the same date last month" are windows of different lengths.
30 Days Ago — Facts at a Glance
- 30 days back is exactly 4 weeks and 2 days — counted on the real calendar, across month ends and leap years.
- A 30-day span contains 20 or 22 business days depending on the starting weekday — the panel above gives the exact count for your start date.
- Counted back from Monday, November 9, 2026, 30 days lands on Saturday, October 10, 2026 — day 283 of 2026, in ISO week 41.
- US federal holidays inside it: Columbus Day (October 12, 2026). The holiday list uses the 11 US federal holidays on their calendar dates; when a holiday falls on a weekend, the federal government observes it on the nearest weekday, which can shift a day off without moving the date listed here.
Frequently Asked Questions
What date was 30 days ago?
Counted back from today, it is the date at the top of this page — the calculator works it out live for the day you visit. As a fixed example, 30 days before Monday, November 9, 2026 was Saturday, October 10, 2026: 20 of the days in that span are business days and 10 fall on weekends. US federal holidays inside it: Columbus Day (October 12, 2026).
How many business days are in the last 30 days?
Between 20 and 22, depending on the weekday you count back from — the weekends inside the span are what moves the count. The result panel on this page reports the exact business-day total for the start date you pick, and also shows the date you land on if the 30 days are counted backwards in business days only.
Does a "last 30 days" window include today?
It depends on the tool, and the difference is a classic source of one-day mismatches. Many analytics tools define "last 30 days" as a 30-day window ending today — today plus the 29 days before it. Others mean 30 full days back. This page counts exactly 30 full days back from the start date you choose; if a report's figure looks like it starts a day early or late, the endpoint convention is the first thing to check.
Is 30 days ago the same date as one month ago?
Only when the month behind you has exactly 30 days. One month before November 9, 2026 is October 9, but 30 days before it is October 10 — one day later, because October has 31 days and the backward count crosses it. When a statement says "last 30 days" it means the fixed count this page performs, not the same-date-last-month shortcut.