A court deadline calculator turns a triggering event and a rule-based period into an exact due date. Litigators live by deadlines — a response, a motion, an appeal, or service of process — and miscounting by a single day can forfeit a right. This tool adds a period of calendar days or business days to a trigger date, applies the standard “exclude the trigger day” convention, and rolls any deadline that lands on a weekend or U.S. federal holiday forward to the next open court day.
How it works
The engine starts from your trigger date and, by default, treats it as day zero — counting begins the following day, the rule found in Federal Rule of Civil Procedure 6(a)(1) and mirrored in most state codes.
In calendar-day mode it simply advances the date by the full period, then checks the landing day: if it is a Saturday, Sunday, or federal holiday, the deadline rolls forward to the next business day.
In business-day mode it advances one day at a time, counting only days that are not weekends or holidays, until it has counted the requested number of business days. The result is therefore always a business day already.
Federal holidays are computed each year, including floating rules such as the third Monday in January, and the observed-weekday shift when a holiday lands on a Saturday (observed Friday) or Sunday (observed Monday).
Due date = trigger date + period, with weekend/holiday roll-forward applied to the final day.
Example and notes
Suppose a complaint is served on a Friday and the answer is due in 21 calendar days. Twenty-one days later is a Friday again — a business day — so the deadline stands. But if 21 days landed on a federal holiday Monday, it would roll to Tuesday.
For a 10 business-day motion response, the tool skips four weekend days (and any holiday), so the deadline falls roughly two calendar weeks out. Always cross-check the governing rule and any local standing orders: state court holiday lists and “three-day mail” additions are matter-specific and are not assumed here.