Count the days between two dates — including weeks and business days — or add and subtract days, weeks, months and years from any date.
"60 days from signing", "90-day probation", "30-day notice" — get the exact calendar date, or count only business days.
Days until the wedding, the trip or the exam — and how many weekends are in between.
Net-30 due dates, visa windows (90/180 days), warranty periods — clamp-safe month math like a spreadsheet.
Yes. Counting uses calendar dates (not raw 24-hour blocks), so daylight-saving switches never produce off-by-one errors, and Feb 29 is handled correctly.
Include it when both endpoints count — e.g. medication days, rental days, all-inclusive event durations. Exclude it for "days until" style countdowns.
No — holidays differ by country and region, so the business-day count is Mon–Fri only. Subtract your local holidays from the result.