It's hard to believe. Fifty-eight years ago, Joan Baez began her legendary residency at Boston's famed Club 47. Her earliest recordings fed a host of traditional ballads into the rock vernacular, before she unselfconsciously introduced Bob Dylan to the world in 1963 and focused awareness on songwriters ranging from Woody Guthrie, Dylan, Phil Ochs, Richard Farina, and Tim Hardin, to Kris Kristofferson and Mickey Newbury, to Dar Williams, Richard Shindell, Steve Earle and many more.

She remains a musical force of nature whose influence is incalculable — marching on the front line of the civil rights movement with Martin Luther King Jr., inspiring Vaclav Havel in his fight for a Czech Republic, singing on the first Amnesty International tour and just this year, standing alongside Nelson Mandela when the world celebrated his 90th birthday in London's Hyde Park.

Baez brought the Free Speech Movement into the spotlight, took to the fields with Cesar Chavez, organized resistance to the war in Southeast Asia, then 40 years later saluted the Dixie Chicks for their courage to protest war.

If ever a new collection of songs reflects the momentous times in which Joan finds herself these days, and in her own words, “… speaks to the essence of who I am in the same way as the songs that have been the enduring backbone of my repertoire for the past 50 years,” “Day After Tomorrow” is that record, her first new studio album in five years.

Themes of hope and homecoming weave through “Day After Tomorrow.” Other songs explore the individual and collective anguish of life during wartime, starting with the Tom Waits title track, "Day After Tomorrow" (introduced on his 2004 album “Real Gone,” and reprised as the emotional closing track of “Body Of War,” the award-winning 2007 documentary of a paralyzed Iraq war recruit) and the haunting “Scarlet Tide” (written by Elvis Costello and T Bone Burnett for the 2003 Civil War film, “Cold Mountain”).

Reserved seating tickets for the Tuesday, Oct. 4 show are $50, $60 and $70. Buy tickets in person at the Merrill Auditorium Box Office located at 20 Myrtle Street in Portland, charge by phone: 207-842-0800 or online at www.porttix.com.