Add days to a date
What's 90 days from today? 6 weeks before a deadline? Pick a start date, choose add or subtract, and get the exact resulting date with its day of the week. Days and weeks shift the calendar exactly; months and years clamp to the end of shorter months, so January 31 plus one month is the last day of February, not March 2.
Common questions
- What is 90 days from today?
- The calculator defaults to today as the start date. Set the amount to 90 and read the result, including which weekday it lands on.
- What happens when I add a month to January 31?
- You get the last day of February (the 28th, or the 29th in a leap year). When the target month is shorter, the day clamps to the month's end rather than spilling into the next month, which is the behaviour you usually want for billing and deadlines.
- Can I subtract dates instead?
- Yes. Switch the operation to Subtract, or use the days-between-dates calculator if you have two dates and want the gap between them.