Rangdom

What date is N days from a date?

Pick a start date, choose whether to add or subtract, and enter any combination of years, months, weeks, and days — each field is optional and treated as 0 when left blank. This tool reports the resulting calendar date, its weekday name, and the ISO YYYY-MM-DD string, all updating live as you type. It is the inverse of the Date Difference Calculator: that one answers “how far apart are two dates?”, this one answers “what date is N units from here?”.

Units apply in a fixed order — years, then months, then weeks, then days. Month math clamps overflow the conventional way, so January 31 plus one month lands on the last day of February (the 28th, or the 29th in a leap year). Dates are computed from UTC values, so results never drift by one across a daylight-saving change. Time-of-day, time zones, business-day skipping, and holiday calendars are out of scope — this is date-only arithmetic.