Definition
Boon days (also called "due days") were specific days throughout the year on which copyhold tenants in England were obligated to perform corporal — that is, physical labor — services for the lord of the manor. These services typically included agricultural and domestic work such as reaping or carrying grain, tiling the lord's house, or thatching his barn. The obligation arose from the nature of copyhold tenure itself, which bound tenants to render defined customary duties to the lord in exchange for their right to hold land.
Boon days were not casual or voluntary offerings; they were enforceable feudal obligations fixed by custom and recorded in the manorial rolls. The number and nature of boon days varied by manor, but the character of the obligation — bodily labor on behalf of the lord — was consistent.
Common Language
The word "boon" in modern English commonly means a benefit, blessing, or favor — something received gratefully (Wiktionary). In Webster's 1913, "boon" carried a related sense: a gift, a prayer or petition, or something pleasant and beneficial.
The legal meaning runs almost opposite to the modern common sense. In copyhold tenure, boon days were not a favor extended to the tenant — they were a burden imposed on the tenant. A researcher encountering "boon days" in a manorial document and importing the modern sense of "boon" as a benefit will badly misread the source.
Common Confusion
Boon days are sometimes conflated with other forms of feudal service obligation, particularly villein services or general labor dues. The distinction matters: boon days were a specific, calendared subset of service — fixed days for fixed tasks — rather than an open-ended or perpetual obligation to labor on demand. The term also appears alongside "due days," which is its functional synonym in some sources; researchers should treat the two as interchangeable unless a specific manorial record draws a distinction.
Why It Matters in Research
Boon days appear almost exclusively in sources dealing with English feudal land tenure, particularly copyhold, and are effectively extinct as a live legal concept following the Law of Property Act 1922, which abolished copyhold tenure. Researchers are most likely to encounter the term in:
— Historical treatises on manorial law and feudal tenure
— Manorial court rolls and customary records predating the twentieth century
— Legal history scholarship on the transition from feudal to modern land tenure systems
The principal trap is chronological: boon days belong to a legal world that had largely dissolved by the nineteenth century, and American legal sources will not use the term in any operative sense. Any appearance in an American context is either antiquarian, comparative, or an error. The term is also a useful signal in a source: its presence dates the document or confirms its English manorial context, which may help researchers authenticate or situate primary sources.
No meaningful jurisdictional variation exists because the concept never crossed into American common law as a distinct legal category. It is a product of English copyhold tenure, which had no direct equivalent in American property law.
Historical Dictionary Support
The three source dictionaries are in substantial agreement. Black's (both editions) and Burrill converge on the core elements: these are days certain in the year, the obligation falls on copyhold tenants, and the required services are physical or corporal in nature. Burrill is the most descriptive, providing concrete examples — reaping, carrying corn, tiling, thatching — that Black's abbreviates.
All three sources treat the term as settled and uncontroversial, which reflects its status by the time these dictionaries were compiled: a historical category being recorded for reference rather than a live point of legal debate. None of the sources engages with the manorial enforcement mechanism or discusses remedies available to lords when tenants failed to appear on boon days, which leaves a gap for researchers needing procedural detail. For that level of granularity, manorial law treatises and court roll scholarship are the appropriate next sources.
Whishaw's law dictionary is cited in both Black's editions as the underlying authority, suggesting the definition passed largely intact from earlier compilation into the Black's corpus without significant re-examination.
Encyclopedia Cross-Reference
No Law Mind Encyclopedia entry directly addresses copyhold tenure or English manorial law. The matched entries (Tax Encyclopedia: IRS Notice of Deficiency; Immigration Encyclopedia: Federal Court Review) are not relevant to this term.