Large language models like Claude and GPT-4 are extraordinary at reading comprehension. They can parse a 30-page trial order and identify every trigger event, deadline mention, and docketable action with remarkable accuracy.
But ask an LLM to count 20 business days from March 3, 2026 — skipping Presidents' Day, weekends, and checking whether the result falls on a Florida state holiday — and you'll get a wrong answer about 30% of the time.
The Problem With LLM Calendar Math
LLMs don't have calendars. They don't have access to holiday databases. They approximate. For most tasks, approximation is fine. For litigation deadlines, approximation is malpractice.
The Hybrid Architecture
That's why Docket4Me uses a hybrid approach:
- **AI reads the document** — Claude extracts trigger events, identifies applicable rules, and suggests deadlines with confidence scores.
- **Code calculates the dates** — A deterministic Python rules engine computes exact dates using jurisdiction-specific rules, verified holiday calendars, and service method adjustments.
- **You verify** — Every entry shows both the AI suggestion and the code calculation. Mismatches are flagged instantly.
This isn't a compromise. It's the only architecture that's both fast and trustworthy.
How Docket4Me Handles Edge Cases
Our rules engine handles the subtle cases that trip up manual docketing:
- The "Mailbox Rule" — When service is by U.S. mail, Florida adds 5 calendar days (Rule 2.514(b)). Federal courts add 3 days under FRCP 6(d). The engine automatically applies the correct add-on based on detected service method.
- Three-Day Service Addition — FRCP Rule 6(d) adds 3 days after the period when service is by mail, leaving it at the office, or electronic means. This stacks on top of the base period.
- Holiday Cascading — When a deadline falls on a holiday, it rolls to the next business day. But what if that next day is also a holiday? The engine handles multi-day cascades (e.g., Christmas + day after Christmas).
- Weekend + Short Period Interaction — In Florida, periods under 7 days exclude weekends AND holidays. A "5-day" period that crosses a weekend is actually 7+ calendar days.
- Backward Computation — Motions that must be filed "30 days before hearing" count backward. The engine handles this correctly, including adjustments when the computed date falls on a weekend.
Every calculation shows the step-by-step math so you can verify the logic yourself. That's the bar for a tool attorneys can trust.