What Date Was 21 Days Ago?

Twenty-one days ago was exactly three weeks back, on today's weekday. It's a common look-back for symptoms, test results and three-week habit challenges.

21 days is 3 weeks.

That's 504 hours, or 30,240 minutes.

Counting back 21 calendar days includes weekends. If you only need working days, use the business-day date shown above, which skips Saturdays and Sundays but not public holidays.

On a paper calendar, move up 3 rows from today. That covers 21 days and keeps you on today's weekday. There are no extra days to add, so that square is your answer.

Need the answer for a date other than today? This table applies the same 21 days to a fixed start date in every month of 2026. For any other start date, use the add or subtract days tool.