How to add days to a date
Pick the start date, type the number of days (or weeks, months, years) and the result appears instantly. The calculator handles month lengths and leap years for you. Adding one month to 31 January gives 28 February (or 29 in a leap year), because February has no 31st.
Common questions people search
| Question | How to get it |
|---|---|
| What date is 90 days from today? | Add 90 days (default above) |
| 30 business days from a date | Tick working days, type 30 |
| How many days until Christmas? | Days between today and 25 Dec (or use the countdown) |
| How many working days in a month? | Days between the 1st and last day, end date included |
| Notice period end date | Add weeks, then check the weekday |
Working days and bank holidays
Working days are Monday to Friday. Choose a holiday list to also skip US federal holidays (as published by OPM, including observed dates) or UK bank holidays in England and Wales (from GOV.UK). Scotland and Northern Ireland have extra days, so check those separately. See the full list in our public holidays 2027 guide.
Date Calculator FAQs
How do I calculate days between two dates?
Enter both dates in the Days between two dates box. You get total days, weeks, years-months-days and working days. Tick Include the end date if both days should count.
What is 90 days from today?
Open the page and look at the first result: it adds 90 days to today’s date by default and shows the weekday.
How many working days are in 2027?
There are 261 weekdays (Mon–Fri) in 2027. Taking off the 12 US federal holiday dates that fall in 2027 (including Friday 31 December, observed for New Year’s Day 2028) leaves 249. Taking off the 8 England & Wales bank holidays leaves 253.
Does it count leap years?
Yes. All calculations use real calendar dates, so 29 February is included in leap years (2028 is the next one).