The Celtic Tiger is a period of rapid economic growth in Ireland begining in the 1990s and slowing in 2001. Information on the Celtic Tiger is represented by the years 1950-2005 mostly.
The term "Celtic Tiger" was a reference to the Irish economy when it was very strong, not to Ireland itself. It came from the reference to some of the strong economies in Asian as being Asian tigers. As Ireland is a Celtic nation, the term used was "Celtic Tiger". The Irish economy is not as strong now as it was a few years ago, so the economy as it is now is no longer referred to as the Celtic Tiger.
There's actually no such language as "Celtic". Celtic refers to a group of dozens of languages, six of which are spoken today:BretonCornishIrish GaelicManxScottish GaelicWelsh
Celtic Frost ended in 1993.
Celtic TV ended in 2009.
Walker Celtic F.C. ended in 1939.
Belfast Celtic F.C. ended in 1949.
Farsley Celtic A.F.C. ended in 2010.
Cork Celtic F.C. ended in 1979.
The Samhain festival is a festival that is Celtic. It is celebrated at the end of the summer or the beginning of fall. The Celtic celebrate it for the end of summer.
Ireland
In Celtic traditions it marks the end of summer, November 1 is the Celtic New Year.