What Date Was 1 Month Ago?

Check the exact date 1 month ago

This is calculated from today’s date. Everything runs in your browser and follows your local time zone.

Date 1 Month Ago:

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Target Day Number: — of —

Target Week Number: — of —

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How long is one month?

One month doesn’t have a fixed length—it can be 28, 29, 30, or 31 days depending on the months involved. This page uses a true calendar-month lookback (same day, previous month where possible).

*Ranges shown are for typical Gregorian months. This tool always uses your actual calendar dates for “1 month ago.”

What is the date 1 month ago in numbers?

MM-DD-YYYY—
DD-MM-YYYY—
YYYY-MM-DD—
MM/DD/YYYY—
DD/MM/YYYY—

For rent, billing, HR, and systems work, YYYY-MM-DD (ISO 8601) is the safest format.

“1 month ago” — quick FAQ

Which time zone is used?

The result uses your device’s current time zone and updates automatically at your local midnight, so “1 month ago” lines up with your own calendar and billing cycles.

Is 1 month ago the same as 30 days ago?

Not always. This tool subtracts one calendar month, not a flat 30 days, so it respects real month lengths and is better for rent, invoices, and policy rules that say “within 1 month.”

Are weekends and holidays included?

Yes — we work with calendar dates. If you need to count only workdays between today and that date, use the Date Difference Calculator with weekdays-only selected.

Can I copy the result?

Use the buttons under the headline to copy the long-form date or the ISO 8601 version directly into forms, emails, and reports.

When would I check what date was 1 month ago?

Common cases include rent and subscription cycles, content or social media planning, performance reviews, churn and retention analysis, and short-term contracts or notice periods.

How we calculate “1 month ago” (and why it’s accurate)

This page is tuned for one job: show the exact calendar date that falls 1 month before today. The headline matches our Time & Date style so the answer is easy to scan: a bold long-form date like Monday, October 7, 2025 (example only). Underneath, we provide the ISO format, plus the target day-of-year and ISO week number for clean documentation.

True calendar-month logic. We don’t assume 30 days. The script moves back one month using your local date. If the previous month doesn’t have the same day (for example, from March 31), JavaScript’s date engine resolves it consistently, giving you a practical calendar answer that matches how most billing and contract rules are applied.

Great for real-world 1-month rules. Many scenarios reference “within the last month”: rent due dates, recurring invoices, probation checks, content performance lookbacks, trial periods, and light-touch compliance checks. This page gives you a single authoritative date you can paste into systems without hand-counting.

Multiple numeric formats. To avoid ambiguity between regions, we list the same date in MM-DD-YYYY, DD-MM-YYYY, and ISO YYYY-MM-DD, plus slash variants, so you can match whatever your form or application expects.

Private by design. All calculations run entirely in your browser. No dates or identifiers are sent to our servers. If something seems off, confirm your device’s date, time, and time zone, then refresh.