Emmylou Harris, Robert Plant, Punch Brothers, Molly Tuttle, and Yasmin Williams all perform at the Hardly Strictly Bluegrass festival in San Francisco's Golden Gate Park this weekend. The festival is free to attend and is streamed online for those who can’t make it there. Tuttle plays the Banjo Stage tonight, and Sunday is stacked with music, as Williams joins fellow guitarist William Tyler at Horseshoe Hill, before Punch Brothers perform on the Rooster Stage, just before Plant and the band Saving Grace play the Towers of Gold Stage, after which Harris, who has performed at every edition of the festival since its launch, closes down the Banjo Stage.

Ahead of their Sunday set, Robert Plant and Saving Grace perform at San Francisco's Orpheum Theatre tonight. Their EP Saving Grace: All That Glitters… is out digitally on October 9; you can hear the track “Two Coats” and watch the video here.

Punch Brothers' Hardly Strictly set follows two shows in Oregon this weekend: at Revolution Hall in Portland tonight and Tower Theatre in Bend on Saturday. Their new Garden & Gun Back Porch Session featuring music from their album The Unsung Adventures of Punch Brothers can be seen here.

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Steve Reich, whose 90th birthday is on Saturday, is being celebrated at the Steve Reich at 90 festival curated by Colin Currie at The Glasshouse in Gateshead, England, all weekend, with performances of his Drumming, Music for 18 Musicians, The Desert Music, and Electric Counterpoint. Performers include the Colin Currie Group, Bryce Dessner of The National, Royal Northern Sinfonia, and BBC Scottish Symphony Orchestra. In Austria, over the course of twenty-four hours, musical ensembles perform twenty Steve Reich program segments at twenty-five locations throughout the city of Graz on Saturday, for Graz spielt Steve Reich.

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k.d. lang is being honored by an array of peers, friends, and musicians she's inspired at k.d. lang: has always been—An Evening Celebrating a Musical Legacy in the National Arts Centre's Southam Hall in Ottawa, Canada, tonight. Performers include Jann Arden, Michael Bublé, Allison Russell, Jill Barber, Mariel Buckley, Wyatt C. Louis, Ron Sexsmith, Jane Siberry, and other artists who join lang at the event—"dedicated to the voice, the vision, and the enduring impact of one of Canada’s most distinctive and influential artists," say the presenters, "the definitive celebration of a monumental talent." There is an accompanying exhibit featuring archival materials and memorabilia exploring lang's cultural impact.

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John Adams’s composition “Short Ride in a Fast Machine,” from his Two Fanfares for Orchestra, is performed by the Los Angeles Philharmonic conducted by Kwame Ryan at Walt Disney Concert Hall in Los Angeles tonight, Saturday, and Sunday, on a program with works by Copland and Mozart. Some 5,500 miles away, the same piece is performed by Sussex Symphony Orchestra, conducted by Mark Andrew James at All Saints Church in Hove, England, on Saturday. Closer by, the other of the Two Fanfares, "Tromba Lontana," is performed by the Guernsey Symphony Orchestra at St. James Concert and Assembly Hall in Guernsey, England, on Saturday, as part of the Guernsey Photography Festival.

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Rhiannon Giddens plays at Ulster Hall in Belfast, Northern Ireland, on Saturday. Her new album, inspired by the beauty of people coming together and drawing strength from each other, Hope Is the Thing with Feathers, is out now. Hot Press writes that it is “folk heavyweight in excellent form.... Rhiannon Giddens has become more than a musician; the Grammy and Pulitzer winner has become a keeper of the American folk flame.” You can hear the album here.

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Mary Halvorson, joined by drummer and composer Tomas Fujiwara, performs at Close Up in New York City on Sunday, as part of the Orchard Street Jazz Festival. Halvorson's latest album, Slo-Mo Neon Luminate Hoverings, a collaboration with label mate trumpeter/composer Ambrose Akinmusire, released earlier this year.

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Cécile McLorin Salvant has two shows in France this weekend, performing songs from her recently released first orchestral album, With Every Breath I Take, orchestrated by Darcy James Argue, with Orchestre de Chambre de Paris at Théâtre des Champs-Élysées in Paris tonight, and from her previous album, Oh Snap, at Opéra National de Bordeaux in Bordeaux on Sunday.