Legal Deadline Calculator

Add a number of calendar or business days to a trigger date to find your deadline. Weekends and the court holidays you list can be skipped or rolled forward, and you see the days remaining at a glance. Everything runs in your browser — nothing is uploaded.

📖 How it works & FAQ

Start (trigger) date

Days to add

Day type

If it lands on a weekend or holiday

Court holidays (optional, YYYY-MM-DD, separated by commas or new lines)

Count legal deadlines without off-by-one mistakes

Most legal deadlines are just a trigger date plus a set number of days — answer within 30 days of service, object within 14 days of an order, respond within 10 business days of a notice. The mistakes happen at the edges: whether the rule means calendar days or business days, and what happens when the final day lands on a Saturday or a court holiday. This calculator handles both. In calendar mode it counts every day, then optionally rolls a deadline that falls on a weekend or holiday forward to the next business day — the way most procedural rules, such as FRCP 6, work. In business-day mode it skips weekends and every holiday you list while counting. It is informational only — an estimate, not legal advice — so always verify a deadline against the governing rule or with an attorney.

How to use it

Enter the start (trigger) date: the date of service, filing, notice, or signing.
Enter the number of days the rule gives you.
Choose calendar days or business days, matching the rule's wording.
Paste any court holidays as YYYY-MM-DD dates so they are skipped or rolled past.
Read the deadline plus the calendar and business days remaining — results update live as you type.

FAQ

Do I count the trigger date itself?: Under most rules, no — day 1 is the day after the trigger event, which is exactly how this tool counts. If your rule treats the trigger date as day 1, enter one fewer day.
What is the difference between calendar and business days?: Calendar days include every day of the week. Business days count Monday through Friday only and skip any holidays you list, so a 10-business-day deadline usually lands about two weeks out.
Which holidays are excluded?: Only the ones you enter. Court holiday schedules vary by jurisdiction and year, so paste the official list for your court rather than relying on a generic national set.
Is my information private?: Yes. Everything runs locally in your browser — no dates are uploaded, stored, or sent to any server.