Days Ago Calculator

Enter the number, pick the unit, and leave it on days. The calculator counts back from today and returns the full calendar date plus the weekday. For example, 30 days ago from a Saturday in late June lands on a Thursday in late May.

Yes. It uses your device's current local date as the starting point and subtracts the number of days, weeks, months, or years you enter. The result panel also shows the exact date it counted back from.

Yes. Switch the unit dropdown to weeks, months, or years. Weeks subtract whole 7-day blocks, while months and years move the calendar by that many months and keep the same day of the month when possible.

When you go back by months or years and the starting day is missing in the target month, the result moves to that month's last day. For example, one month before March 31 is the last day of February, which is February 28 or February 29 in a leap year.

Yes. All units use the standard Gregorian calendar, so February 29 in leap years is handled correctly. Counting back one year from February 29 lands on February 28 of the prior year.

The calculator names the weekday of the past date, from Sunday through Saturday, alongside the long date and the ISO format. That makes it easy to confirm whether a past deadline or event fell on a weekday or a weekend.