Definition
Days on which courts do not sit and legal business is not transacted. The term originates in the concept of days "free from labor and pleading" — that is, days on which the machinery of the law was suspended. In practice, ferial days functioned as the opposite of juridical days (dies juridici), which were days on which courts were open and proceedings could lawfully be taken.
The term carries an important internal ambiguity: depending on context and century, it has meant (1) holidays and feast days on which courts did not sit, or (2) weekdays generally, as distinguished from Sunday. These two meanings point in nearly opposite directions and require careful attention to context when encountered in historical sources.
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Common Language
Modern common usage (Wiktionary): "Ferial" in general English refers to ordinary weekdays of the church calendar — days that are neither feasts nor fasts. A ferial day is a plain, unremarkable day.
Historical common usage (Webster's 1913): Webster's 1913 defines "ferial" as relating to holidays or to ordinary weekdays, noting the term's ecclesiastical dimension — days not marked by a feast.
The gap between common and legal meaning here is genuine and runs in two directions. In ecclesiastical usage, "ferial" connotes an ordinary, unmarked day. In early legal usage, it meant a holiday or day of rest from courts. The later statutory use in 27 Hen. VI reverses the ecclesiastical sense entirely, treating ferial days as working days. A researcher encountering this term must resolve which tradition the source is drawing on before any reliance on common-language intuition is safe.
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Common Confusion
FERIAL DAYS vs. JURIDICAL DAYS: These are near-opposites. Juridical days (dies juridici) are days on which courts may lawfully sit and proceedings may be taken. Ferial days are, in the primary legal sense, days on which courts do not sit. The confusion risk is compounded because one historical usage of "ferial" means weekdays — which, in modern practice, are typically the days courts do sit. A researcher who applies the modern weekday meaning to a medieval pleading context will invert the intended meaning entirely.
FERIAL DAYS vs. NON-JURIDICAL DAYS: "Non-juridical days" is the more common modern term for days excluded from court computation. The two concepts overlap substantially, but "ferial days" carries the historical and ecclesiastical freight that "non-juridical days" does not.
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Why It Matters in Research
This term is almost exclusively a historical research problem. It does not appear in modern U.S. procedural codes or court rules in this form; contemporary equivalents are "legal holidays," "court holidays," or "non-judicial days," all of which are defined by statute or local rule and carry none of the ambiguity ferial days does.
When encountered in Law Mind corpus materials, ferial days will appear in:
1. Old English legal sources and their American successors through the early republic, where the term preserves its holiday/non-sitting meaning.
2. Statutory interpretation contexts referencing 27 Hen. VI c. 5, where ferial days means working days — the inverse of the primary legal definition.
3. Ecclesiastical law discussions imported into civil contexts, particularly around computation of time in pleading.
The research trap is the internal contradiction across sources. Burrill and Bouvier both flag it, and both point to the 27 Hen. VI statute as the source of the divergent usage. A researcher must determine whether the source being analyzed is drawing on the common law holiday tradition or the statutory working-day meaning. The difference is not academic: in time-computation questions (deadline calculation, limitations periods), getting this wrong reverses the result.
Deadline computation remains the live research connection. Modern courts computing deadlines under rules that exclude legal holidays or non-judicial days are applying the functional descendant of the ferial/juridical day distinction. Understanding the original concept illuminates the structure of modern exclusion rules, even if the vocabulary has changed.
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Historical Dictionary Support
The four historical dictionaries consulted show substantial agreement on the term's dual meaning while differing in how they weight each sense.
Black's (both editions) leads with the holiday meaning and adds the weekday meaning as secondary, citing Cowell without elaboration. Burrill does the same but adds the 27 Hen. VI citation, which is the critical statutory anchor for the weekday meaning. Bouvier is the most precise: he identifies the original and proper meaning as days free from labor and pleading, then separately flags the statutory inversion. This sequencing matters — Bouvier correctly treats the holiday/non-pleading sense as primary and the statutory working-day sense as a departure.
All four dictionaries cite Cowell (John Cowell's Interpreter, 1607) as the underlying authority, which locates the term firmly in early modern English legal scholarship rather than in reported case law. No case authority is offered by any of the dictionaries, which is itself informative: ferial days as a term of art was absorbed from ecclesiastical and civil law learning rather than developed through common law adjudication.
What the historical dictionaries do not address: the practical mechanics of which specific days qualified as ferial in different periods, how courts treated the distinction in deadline computation, or any American development of the concept. For those questions, the dictionaries are a starting point, not a stopping point.
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Jurisdictional Note
The term has no operative presence in modern U.S. state or federal law under this name. American jurisdictions have replaced the concept entirely with statutory definitions of "legal holidays" and "court holidays," supplemented by local court rules. Researchers working in English legal history or in jurisdictions with sustained civil law influence (Louisiana, Quebec) may encounter the term with more frequency, but even there, modern procedural codes will have displaced it.
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