Non-judicial day
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
One on which process cannot ordinarily issue or be served or returned and on which the courts do not ordinarily sit.
Whiiney v. Blackburn, 17 Or. 564, 21 Pac. 874, 11 Am. St. Rep. 807.
More properly "non-juridical day."