Add or Subtract Days
“What day is 100 days from today?”, “What's 3 months after the contract date?”, “When is 10 business days from now?” — answered instantly.
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Business days skip Saturdays and Sundays only; public holidays vary by country and aren't excluded.
Result
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At a glance
| Period | Date | Day |
|---|
Count forward or back from any date
Pick a start date, enter a number and a unit, and choose whether to go forward or back. The result shows the date, the weekday and how many days apart it is. The table below gives common milestones at a glance.
- Days / weeks — exact calendar days.
- Months / years — same day of the month; if that day doesn't exist (e.g. one month after January 31), the last day of the month is used.
- Business days — counts Monday to Friday only. Public holidays differ by country and aren't skipped, so add them yourself if needed.
Counting the start date as day 1
Some anniversaries (like a couple's 100th day) count the first day as day 1, so “100 days” lands one day earlier than a plain date difference. Tick the box to use that convention.
Frequently asked questions
Why does one month after January 31 give February 28?
February has no 31st, so the result is moved to the last day of the month — the convention used by most spreadsheets and contracts.
Are public holidays excluded from business days?
No — only weekends. Holidays vary by country and region.