What date was 1 month ago?
The exact date 1 month ago, worked out for your today, with the weekday, the working days in between and a calendar.
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1 month ago
Friday, September 11, 2026
That was 30 days before today (4 weeks and 2 days).
- Date
- 2026-09-11
- Working days (Mon–Fri)
- 21
- Weekend days
- 9
- Day of the year
- 254
- Week number (ISO)
- 37
| S | M | T | W | T | F | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | ||
| 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 13 | 14 | 15 | 16 | 17 | 18 | 19 |
| 20 | 21 | 22 | 23 | 24 | 25 | 26 |
| 27 | 28 | 29 | 30 |
- Runs on your deviceEvery tool works directly in your browser. No files are uploaded.
- Your privacy mattersYour files never leave your device, so there's nothing for us to store.
- No limitsUse any tool as much as you need. No daily caps, no waiting.
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How 1 month ago is counted
Today is day 0. Going back 1 month gives the date in the box above, worked out on your device for your time zone, so it's right wherever you are. Months are counted on the calendar: the same day of the month, moved to the last day when a month is shorter (one month after January 31 is February 28, or 29 in a leap year).
For example, from Sunday, October 11, 2026, 1 month earlier is Friday, September 11, 2026.
Need a different start? Pick a date under “Count from another date”, or use the date calculator for any mix of years, months, weeks and days.
1 month in other units
| Days (average) | about 30 |
|---|---|
| Weeks (average) | about 4.3 |
Other dates people look up
Frequently asked questions
Does "1 month ago" count today?
No. Today is day 0, and the date 1 month ago is the day you reach by going back 1 month from today. If you count today as day 1, tick that box above and the date moves one day closer to today.
How many days is 1 month?
It depends on which months you cross, because months have 28 to 31 days. 1 month is about 30 days on average. The answer above counts real calendar months from today.
How many working days is 1 month ago?
The answer box shows the Monday-to-Friday days between today and that date, counting the days after today back to the date. It changes with the day of the week you start on. Public holidays aren't removed, so subtract any that fall in between.
What date is 1 month from today?
See 1 month from today for the date the same distance ahead, or use the date calculator to add or subtract any number of days, weeks, months or years.