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I don't know of any jazz festivals which go by the name 'Kool'. If you were referring to 'cool' jazz festivals, ie the most popular ones, then you'll generally find that they run in the early summer to late autumn when the weather is nicest. They do run throughout the year as both the northern and Southern Hemisphere have many jazz festivals.
What else can I help you with?
When was Montreux Jazz Festival created?
Montreux Jazz Festival was created in 1967.
When was Charlie Jazz Festival created?
Charlie Jazz Festival was created in 1998.
When was Berkeley Jazz Festival created?
Berkeley Jazz Festival was created in 1967.
When was Brecon Jazz Festival created?
Brecon Jazz Festival was created in 1984.
When was Hampton Jazz Festival created?
Hampton Jazz Festival was created in 1968.
When was Newport Jazz Festival created?
Newport Jazz Festival was created in 1954.
When was Umeå Jazz Festival created?
Umeå Jazz Festival was created in 1968.
When was Toronto Jazz Festival created?
Toronto Jazz Festival was created in 1987.
When did Cascais Jazz Festival end?
Cascais Jazz Festival ended in 1988.
When was Cascais Jazz Festival created?
Cascais Jazz Festival was created in 1971.
When was Nice Jazz Festival created?
Nice Jazz Festival was created in 1948.
When was Montreux Jazz Festival created?
Montreux Jazz Festival was created in 1967.
When was Cork Jazz Festival created?
Cork Jazz Festival was created in 1978.
When was Tórshavn Jazz Festival created?
Tórshavn Jazz Festival was created in 1983.
When was Koktebel Jazz Festival created?
Koktebel Jazz Festival was created in 2003.
When was Concord Jazz Festival created?
Concord Jazz Festival was created in 1969.
When was Rome Jazz Festival created?
Rome Jazz Festival was created in 1976.
