I'm focussing on the International in #InternationalJazzDay today. Let's start at home: Canada's greatest jazz pianist: Oscar!
Oscar Peterson by Carel de Vogel
His Canadiana Suite:

Another great Canadian jazz pianist: Paul Bley
Frans Schellekens
The Hague, 1990
#InternationalJazzDay

Diana Krall was born in Nanaimo, here on Vancouver Island.
Peter van Agtmael, 2015
#InternationalJazzDay
With Paul Keller & Russell Malone at the 1996 Montreux Jazz Festival - Route 66:

Arranger, composer, bandleader, composer Gil Evans was born in Toronto
With Miles Davis at work on the album Miles Ahead
Photo: Don Hunstein, 1957

"It was not uncommon for Gil to come home to find Charlie Parker asleep while other musicians listened to recordings & studied scores of Prokofiev symphonies."
Gil Evans's 1961 album Out of the Cool features an Arnold Newman portrait.
#InternationalJazzDay

Kenny Wheeler was born in Toronto
Fin Costello, late 1970s
#InternationalJazzDay
Mark Time, 1992

Guitarist Lenny Breau was born in Maine, but grew up in New Brunswick
Jon Sievert, 1981
#InternationalJazzDay
A Touch of Jazz

Don Francks & Lenny Breau in Toronto in 1963.
Great Canadian Jazz!, thanks to the great @thenfb
#InternationalJazzDay

Oscar Peterson's 1980 album The Personal Touch featured songs written by or made popular by Canadians
#InternationalJazzDay
With Oscar's long-time collaborator, Canadian guitarist Ed Bickert. And Canadian Ruth Lowe wrote these great lyrics:

Two Montreal-born jazz pianists live at the Montreal Jazz Festival: Just Friends
Oliver Jones & Oscar Peterson
#InternationalJazzDay

On #InternationalJazzDay, let's not forget Joni!
The Dry Cleaner from Des Moines: Joni Mitchell with Jaco Pastorius, Don Alias & Michael Brecker

Rob McConnell & the Boss Brass, another fabulous Canadian big band
#InternationalJazzDay

So many great Canadian big band arrangers & band-leaders: Gil Evans, Kenny Wheeler, Rob McConnell, Maynard Ferguson, Guido Basso. And let's not forget Guy Lombardo!
#InternationalJazzDay
Here's another @darcyjamesargue

More Canadian jazz musicians for #InternationalJazzDay
Another big band! Chelsea McBride's Socialist Night School @crymmusic
https://crymmusic.bandcamp.com/album/chelsea-mcbrides-socialist-night-school

With members from the US, Canada, France, Chile, Israel, & Japan, Artemis is a great group to listen to on #InternationalJazzDay
And for this thread, our Canadian musician is @ingridjenmusic https://www.npr.org/2018/11/21/669962702/women-in-jazz-for-artemis-its-bigger-than-a-cause?utm_source=twitter.com&utm_medium=social&utm_campaign=nprmusic&utm_term=music&utm_content=2052