1 Month Ago
One month ago is the shortest calendar-month lookback—ideal for billing cycles, subscription renewals, and monthly reports. Subtract one calendar month from today for the exact past date.
Last updated: July 17, 2026
One month ago was June 21, 2026. Calendar-month subtraction adjusts for 28- to 31-day months.
How this calculator works
Subtract one month from July 21, 2026 using month-length rules, not a fixed thirty-day count.
Month-end references roll to the last valid day in the target month when needed.
Change the reference date for statements closing on a specific day each month.
Worked example
From July 21, 2026, one month ago was June 21, 2026. A monthly subscription billed today likely renewed on that date last cycle.
Enter January 31 as reference to see how month-end subtraction lands in February.
Practical use cases
Monthly KPI comparisons. Rent and lease payments on calendar-month anniversaries.
Newsletters summarizing content published one month earlier.
Frequently asked questions
One calendar month before today was June 21, 2026.
Not always. Months vary in length. Thirty days is a separate shortcut.
Subtracting one month from the 31st adjusts to the last valid day in the prior month when needed.
Yes.
Use month-based from-today shortcuts or the Add Days Calculator with months.
Related calculations
Written & Reviewed by
DateCalx Team
Editorial Team
The DateCalx Team researches, builds, tests, and reviews every calculator to ensure accurate, reliable, and easy-to-understand date and time calculations. Our goal is to provide fast, trustworthy tools for everyday personal, educational, and professional use.
Last reviewed: July 17, 2026
Learn more in our About, Editorial Policy, and Methodology pages, or contact the DateCalx Team.