Days in medieval Ireland when tenants (fuidhirs) were obligated to perform labor services for their landlord.
Compound of 'fuidhir' (tenant) and 'days,' describing specific calendar days designated for feudal labor obligations in Irish land tenure systems.
These weren't just random workdays—they were carefully tracked in early Irish legal codes, showing that medieval Irish scribes were meticulous record-keepers of social obligation centuries before most European societies developed similar systems.
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