dies non

from The Collaborative International Dictionary of English v.0.48

Dies non \Di"es non"\ [L. dies non juridicus.] (Law)
   A day on which courts are not held, as Sunday or any legal
   holiday.
   [1913 Webster]

from Bouvier's Law Dictionary, Revised 6th Ed (1856)

DIES NON or DIES NON JURIDICI. Non-judicial days. Days during which courts 
do not transact any business, as Sunday. The entry of judgment upon such a 
day is void. W. Jones, 156.

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