It always celebrates Bird. But the 2017 iteration of the Charlie Parker Jazz Festival also tips the hat to itself a bit. Sustaining a quarter-century of free annual music programing is certainly a praise-worthy achievement, and this year’s program is actually fatter than usual. Maybe the line-up is trying to parallel the impact of the iconic saxophonist’s bop lingo. From students and vets doing the “With Strings” material, to an interview (and gig) with Parker pal Lee Konitz, to a jam session, film screening and tap dance show, choices abound both uptown and down. The weekend concerts are key. Bill Saxton’s brusque beauty, Art Baron’s wily scholarship, the deep swing of drummers Louis Hayes and Terri Lyne Carrington – options are many. But don’t miss the virtuosity of Anat Cohen, and cross those fingers that the sass of Tia Fuller somehow shares onstage airspace with the blues of Lou Donaldson. As far as Josh Redman goes, well, he clocked the maestro’s “Moose the Mooche” and “Salt Peanuts” on his earliest joints years ago, so he’s always been up for a little ornithology.