When an individual has Friday through Sunday off. Thursday practically ends up being Friday itself. Therefore changing Thursday to Double Friday.
And then God said on the fourth day "I shall name this day Thursday! Unless you don't have work Friday through Sunday then it shall be named Double Friday! The greatest day of all time!"
by Kermit The Froggg August 09, 2012
When a Friday is not only the first day of a weekend but also a break from work, school, etc.
My favorite double Friday is the one for Christmas break
by Walking dictionary November 21, 2014