Add Days to a Date
Add or subtract days, weeks, or months from any date: instantly see the resulting date and which day of the week it falls on.
Why add or subtract days from a date
This is the classic deadline calculation: an invoice due net 30 or net 60, a 30-day return window for an online purchase, a quote that's valid for 90 days, or simply "what's the date 6 weeks from now?". Doing it in your head is error-prone, because months have different lengths and leap years get in the way: here the count is exact, and you also get the day of the week, so you can see at a glance whether a deadline lands on a Saturday or Sunday.
How the "skip weekends" option works
With the box checked, the count only moves forward on business days (Monday through Friday): "10 days" effectively becomes "10 business days," just like carrier delivery times or many office deadlines. The option applies to days and weeks (1 week = 7 calendar days, counted while skipping Saturdays and Sundays); for months, skipping weekends doesn't make sense and is ignored. When you add months and the day doesn't exist in the target month (e.g. January 31 + 1 month), the result stops at the last available day (February 28 or 29).