See it run - a worked example, 100% in this browser tab
What it is
Mass-tort / class-action batch engine. Takes a docket of triggering events (CSV or JSON) and computes, for each event, the resulting filing deadline or statute-of-limitations date in ALL 52 US jurisdictions at once, each on its own court-holiday calendar with the weekend/holiday roll applied. Outputs a sorted jurisdiction matrix with the earliest (binding) and latest dates highlighted, flags every jurisdiction whose specific rule is not yet primary-sourced, and exports the whole matrix to CSV. Exact integer-day arithmetic, in-browser, no data leaves the page. The counting is exact; the period is your legal input and the result is a docketing aid, not legal advice.
Honest scope
Deterministic and citation-backed: every figure is exact arithmetic or a cited rule. Any year- or jurisdiction-indexed value is a confirmable input, never an eternal hardcode. This is a computation tool, not professional (legal, tax, medical, or financial) advice - confirm against the controlling authority for your context.
Authorities cited
Fed. R. Civ. P. 6 (computing and extending time; weekend/holiday roll). https://www.law.cornell.edu/rules/frcp/rule_6
5 U.S.C. 6103 (federal legal public holidays; weekend-observation rule). https://www.law.cornell.edu/uscode/text/5/6103
Cal. Code Civ. Proc. 12, 12a; N.Y. Gen. Constr. Law 25-a; Tex. R. Civ. P. 4; Fla. R. Jud. Admin. 2.514 (state day-counting rules, where sourced).
Statute-of-limitations periods vary by cause of action and jurisdiction and are subject to accrual, discovery, and tolling doctrines - supply the controlling period per jurisdiction.
Run it on your own data
Open it inside GDBS to save runs to Sandbox, attach results to a Worklog case, or share through a Gate client portal - all in the browser, nothing uploaded to anyone’s cloud.