Definition
A Latin phrase meaning "at this day." Used in older common law pleading and procedure to indicate that an act was performed, an appearance was made, or a matter arose on the particular day named in the writ, declaration, or court record. The phrase functioned as a precise temporal marker in formal legal documents, confirming compliance with or reference to a specified date.
Why It Matters in Research
AD HUNC DIEM is a relic of Latin pleading practice and will appear almost exclusively in pre-nineteenth century English and early American case reports, court records, and pleading forms. Researchers encountering the phrase in historical sources should treat it as a procedural timestamp — its presence signals that the document is affirming or referencing a specific date fixed by a prior writ or court order, not introducing a new substantive matter.
The phrase is unlikely to appear in any modern legal context. If you encounter it in a nineteenth-century American court record, it almost certainly entered through inherited English common law pleading conventions rather than domestic innovation. Law Mind corpus researchers should be alert to the fact that brief Latin phrases like this one were often dropped into records without explanation, as readers of the era were assumed to know them. Modern secondary sources and digests will rarely pause to gloss the term.
The citation shared across all three source dictionaries — 1 Leon. 90 — refers to Leonard's Reports, a collection of English common law cases from the reign of Elizabeth I, compiled by William Leonard and published posthumously. This source locates the phrase firmly in the Elizabethan common law tradition. Researchers tracing the phrase to its reported context should consult that volume directly.
Historical Dictionary Support
All three historical sources in the Law Mind corpus agree on the definition without variation: "at this day." Black's Law Dictionary (both editions) and Burrill's Law Dictionary reproduce the phrase and its gloss in near-identical terms, each pointing to 1 Leon. 90 as authority. The consistency here reflects the purely formal and settled character of the phrase — there was nothing contested about its meaning, and so no elaboration was considered necessary.
What the historical dictionaries do not supply is context: none explains the procedural mechanics in which the phrase operated, the pleading forms that called for it, or how it related to adjacent temporal phrases in common law practice. The second edition of Black's places AD HUNC DIEM in sequence immediately before AD IDEM, suggesting the editors organized Latin phrases alphabetically without investing in substantive differentiation. Burrill's Latin prefix signals the phrase's civil law register, though the usage reported is distinctly common law.
Researchers should note that the brevity of all three entries reflects the phrase's status as a term of art whose meaning was completely transparent to trained lawyers of the era — not a term whose legal significance required unpacking, but a formulaic building block of pleading language.