Deadline Engine vs LitigationDeadline

Deadline Engine is a web tool for calculating court and procedural deadlines. It displays the governing citation and the steps behind each calculation, drawing on a catalog that the homepage says contains 4,871 rules across 20 jurisdictions. Its deterministic rule logic accounts for deemed service, applicable clear-day rules, business-day adjustments, official bank holidays and court office closures; it does not use AI to calculate deadlines. The free calculator requires no account. Users can export matters as CSV or JSON, with PDF and calendar exports available per matter. Professional keeps histories of eligible server-recomputed calculations on individual matters and adds calendar feeds and downloadable ICS files. The service does not determine jurisdiction, interpret evidence, read court orders or decide whether a rule applies to a case. Deadline Engine describes its output as procedural information, not legal advice, and says dates should be checked against rules and case facts. It is developed for individual legal professionals, including solicitors, barristers, paralegals and compliance professionals.

LitigationDeadline is a free browser-based set of tools for counting litigation deadlines and business days. Its Deadline Calculator adds or subtracts calendar days or court days from a date. The Business Days Calculator counts inclusively between two dates and separates calendar days, weekend days, and federal holidays in its results. For court or business-day calculations, both calculators skip weekends and the eleven U.S. federal holidays. The site also offers a 2026 civil litigation deadline reference with FRCP and FRAP citations and a downloadable CSV, alongside a Florida calculator covering nine listed deadlines, including answer, discovery, appeal, and proposal for settlement periods. Dates, counts, and results are processed locally in JavaScript and are not sent to the service or third parties. The calculators do not account for additional state, county, or court-specific closures. LitigationDeadline describes the tools as references, not legal advice or a substitute for checking the governing rule; it is not a law firm or court service and does not review individual cases.