» Days Ago Calculator

How do I find what date was X days ago?
Select "Start date" as the field to solve for, enter the number of days in the Days Ago field, and set the End Date to today or any reference date. The calculator instantly shows the resulting past date along with its weekday, week of year, and day of year.

What date was 30 days ago?
Enter 30 in the Days Ago field with today as the End Date and select Start Date as the output. The calculator shows the exact date 30 calendar days before today, including the weekday and other date details.

What date was 90 days ago?
Enter 90 in the Days Ago field with today as the End Date. The calculator subtracts 90 calendar days from today and returns the exact date, which is commonly needed for tax deadlines, financial lookback periods, and legal compliance windows.

How many days are there between two dates?
Select "Days ago" as the field to solve for, then enter a Start Date and an End Date. The calculator shows the exact number of days between them, plus the total in weeks and months.

What date is X days from a given date?
Select "End date" as the field to solve for, enter a Start Date and the number of days, and the calculator returns the future or past date that many days away, including its week number and day of year.

Does this calculator use calendar days or business days?
This calculator counts calendar days, which includes weekends and public holidays. For business day calculations, each weekend or holiday would need to be subtracted separately.

What is the week of year and day of year shown in the results?
The week of year uses the ISO 8601 standard, where week 1 is the week containing the first Thursday of January. The day of year counts from 1 on January 1st to 365 or 366 on December 31st in a leap year.