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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 Hampton Jazz Festival created?
Hampton Jazz Festival was created in 1968.
When was Cotati Jazz Festival created?
Cotati Jazz Festival was created in 1980.
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 Skopje Jazz Festival created?
Skopje Jazz Festival was created in 1982.
When was Beijing Jazz Festival created?
Beijing Jazz Festival was created in 1993.
When was Cotati Jazz Festival created?
Cotati Jazz Festival was created in 1980.
When was Saulkrasti Jazz Festival created?
Saulkrasti Jazz Festival was created in 1997.
When was Chicago Jazz Festival created?
Chicago Jazz Festival was created in 1978.
When was Gărâna Jazz Festival created?
Gărâna Jazz Festival was created in 1997.
When was Rome Jazz Festival created?
Rome Jazz Festival was created in 1976.
When was Malta Jazz Festival created?
Malta Jazz Festival was created in 1990.
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.
