Definition
A Latin term from the civil law and old English law meaning a lawful day, a law day, or a legitimate day — specifically, a day recognized by law as proper for conducting legal proceedings. The term carries three overlapping but distinct uses:
1. A lawful court day: a day on which courts could legally sit and business could be transacted, as distinguished from dies non legitimus (a day on which legal proceedings were suspended, such as holy days or days otherwise excepted from the legal calendar).
2. An appearance day: a day fixed by law or court order on which a party was required to appear before the tribunal.
3. A term day: a day marking the beginning or end of a legal term, used in conveyancing and procedural contexts to anchor dates and obligations.
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Common Confusion
DIES LEGITIMUS is easily conflated with dies juridicus, which similarly denotes a day on which courts may sit and justice may be administered. The distinction is one of framing: dies juridicus emphasizes the judicial character of the day (fit for juridical acts), while dies legitimus emphasizes the lawful character of the day (recognized by law as proper). In practice, older English sources use the terms near-interchangeably, and researchers should not treat the distinction as technically sharp in pre-modern sources. Both stand in contrast to dies non juridicus and dies non legitimus — days on which proceedings were either suspended or void.
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Why It Matters in Research
This term appears almost exclusively in procedural and conveyancing contexts in English legal records from the medieval and early modern periods, and in civil law commentary imported into English legal writing. Its practical significance lies in understanding when procedural acts were legally effective: an act performed on a dies non legitimus could, in certain contexts, be treated as void or voidable.
Researchers working in chancery records, common law pleading materials, or real property instruments from the thirteenth through seventeenth centuries will encounter the term as a marker of procedural regularity. The Rapalje & Lawrence citation to 5 Mason's United States Reports signals that the term surfaced in early federal American practice as well — chiefly in admiralty and procedural contexts where civil law vocabulary persisted longest.
The key research trap is anachronism. Later legal dictionaries, including Black's, treat dies legitimus as historical curiosity and define it cleanly, but in primary sources the term carries weight: an act done on a day not recognized as a dies legitimus could be challenged on procedural grounds. When reading pleading records or procedural treatises, note whether the source is distinguishing dies legitimus from dies non juridicus — the practical stakes of that distinction governed default judgments, return days for writs, and the tolling of certain periods.
For conveyancing contexts (the deed use noted by Rapalje & Lawrence), dies legitimus functions as a reference anchor — a fixed lawful day from which other dates in an instrument are calculated. This usage is closer to the later concept of a term day in leases and financial instruments.
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Historical Dictionary Support
The three source dictionaries are in close agreement on the core definition: a lawful or law day, a term day, and a day of appearance. There is no meaningful divergence among them, which itself signals that the term had settled, consensual meaning within the legal lexicon.
Burrill adds the most substantive texture by referencing Bracton (fol. 334b and 359) and Hallifax's Analysis of the Civil Law — anchoring the definition in both the English common law tradition and the civil law background. This is a useful signal for researchers: the term is genuinely hybrid, reflecting the civil law's influence on early English procedural thinking. Bracton's treatment connects dies legitimus to the court's calendar and to appearance obligations, confirming that the term had real procedural consequence, not merely descriptive function.
Black's and Rapalje & Lawrence provide the same core content without the citation depth Burrill offers. Notably, all three sources immediately follow dies legitimus with dies marchiæ — the day of meeting on the English-Scottish border marches — suggesting that in organizing the dies entries, compilers treated these as naturally adjacent calendar-law concepts. Researchers should be aware that the dies cluster in historical dictionaries is extensive (dies critici, dies dominicus, dies fasti, dies gratiae, dies juridicus, dies non, dies utiles, and others); navigating that cluster is essential for understanding the full temporal vocabulary of procedural law.
What the historical dictionaries do not address is the term's practical application in American law after reception. The Rapalje & Lawrence citation to a U.S. federal case suggests the term crossed the Atlantic in admiralty and equity practice, but none of the dictionaries trace that reception history.
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Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Court Days and the Legal Calendar; Procedural Law in Early English Practice; Civil Law Influence on Common Law Procedure
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