Day-rule, or day-writ
Defined in 2 dictionaries — Ballentine's (1916), Black's (1910)
Ballentine's Law Dictionary
James A. Ballentine · 1916
A court order permitting a prisoner a day out of prison.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
In English law. A permission granted to a prisoner to go out of prison, for the purpose of transacting his business, as to hear a case in which he Is concerned at the assizes, etc. Abolished by 5 & 6 Viet. c. 22, § 12.