from
Jargon File (4.4.4, 14 Aug 2003)
virtual Friday
n.
(also logical Friday) The last day before an extended weekend, if that
day is not a `real' Friday. For example, the U.S. holiday Thanksgiving
is always on a Thursday. The next day is often also a holiday or taken
as an extra day off, in which case Wednesday of that week is a virtual
Friday (and Thursday is a virtual Saturday, as is Friday). There are
also virtual Mondays that are actually Tuesdays, after the three-day
weekends associated with many national holidays in the U.S.