Dates & Time
Date Calculator
Add or subtract days, weeks, months, years or business days from a date and see the resulting date and weekday.
Updated:
Result
Updates as you type30 days later
27 November 2026
- Day of the week
- Friday
- Start
- 28 October 2026 (Wednesday)
- Calendar days between
- 30 days
How it's calculated
Days and weeks are counted as calendar days. Months and years change the month number and clamp a missing day to the end of the month (31 January + 1 month = 28 February). Business days skip Saturdays and Sundays but not public holidays. The result also shows the day of the week.
Worked example
Starting from 28 October 2026 (Wednesday):
- 30 days later: 27 November 2026 (Friday)
- 10 business days later: 11 November 2026 (Wednesday; weekends skipped)
Common periods
| Period | Calendar days later | Business days later |
|---|---|---|
| Period: 7 days | Calendar days later4 November 2026 (Wednesday) | Business days later6 November 2026 (Friday) |
| Period: 10 days | Calendar days later7 November 2026 (Saturday) | Business days later11 November 2026 (Wednesday) |
| Period: 14 days | Calendar days later11 November 2026 (Wednesday) | Business days later17 November 2026 (Tuesday) |
| Period: 15 days | Calendar days later12 November 2026 (Thursday) | Business days later18 November 2026 (Wednesday) |
| Period: 30 days | Calendar days later27 November 2026 (Friday) | Business days later9 December 2026 (Wednesday) |
| Period: 45 days | Calendar days later12 December 2026 (Saturday) | Business days later30 December 2026 (Wednesday) |
| Period: 60 days | Calendar days later27 December 2026 (Sunday) | Business days later20 January 2027 (Wednesday) |
| Period: 90 days | Calendar days later26 January 2027 (Tuesday) | Business days later3 March 2027 (Wednesday) |
| Period: 120 days | Calendar days later25 February 2027 (Thursday) | Business days later14 April 2027 (Wednesday) |
| Period: 180 days | Calendar days later26 April 2027 (Monday) | Business days later7 July 2027 (Wednesday) |
| Period: 365 days | Calendar days later28 October 2027 (Thursday) | Business days later22 March 2028 (Wednesday) |
Frequently asked questions
What date is 30 days from today?
Adding 30 days to 28 October 2026 gives 27 November 2026. The calculator uses today by default; pick another start date and change the number and unit as needed.
How are business days counted?
Saturdays and Sundays are skipped; public holidays are not, because they differ by country and year. Ten business days after 28 October 2026 is 11 November 2026. Add any holidays in the period yourself.
What happens when I add one month to 31 January?
February has no 31st, so the result is clamped to the last day of the month: 28 February 2026. Adding years to 29 February moves to 28 February in the same way.
How do I subtract days?
Set the direction to "Back". Thirty days before 28 October 2026 is 28 September 2026; with business days selected, weekends are skipped going backwards too.
What is this useful for?
Notice periods and contract deadlines, return and delivery windows, medication courses and follow-up dates, visa and passport validity, invoice due dates: any "how many days from now" question. To count the days between two dates, use the days between dates calculator.
Calendar arithmetic only; public holidays, half days and legal rules that extend a deadline falling on a holiday are not applied.