[4] The first demonstration took place in Washington, D.C., on March 24, 2018, with over 880 sibling events throughout the United States and around the world,[5][6][7][8][9] and was planned by Never Again MSD in collaboration with the nonprofit organization Everytown for Gun Safety.

[10] The event followed the Parkland high school shooting a month earlier, which was described by several media outlets as a possible tipping point for gun control legislation.

[29][34] After the success of the walkout, Hogg posted a tweet[35] that included a provocative, NRA-style advertisement calling out lawmakers for their inaction on or opposition to gun control efforts, asking "What if our politicians weren't the bitch of the NRA?

[42] Other people and organizations offering support have included Selena Gomez, Justin Bieber,[43] Gabby Giffords, Lauren Jauregui, Alyssa Milano, Moms Demand Action, Amy Schumer, St. Vincent, Harry Styles,[44] Hayley Williams,[45][46] Paul McCartney,[47] Kanye West, and Kim Kardashian.

[55] John Zimmer and Logan Green, the co-founders of Lyft, announced their support of the rallies and stated that their company would provide free rides for those attending demonstrations.

"[60][61][62] The litany also included the following refrain: From so many heartbreaks comes forth a united commitment to go into the streets of our cities and towns and promote a way of peace and well-being for all people.

[67][68][69] The speakers—all of whom were high schoolers or younger—included Marjory Stoneman Douglas students Cameron Kasky, David Hogg, Delaney Tarr, Sarah Chadwick, Alex Wind, Jaclyn Corin, Ryan Deitsch, Aalayah Eastmond, Samantha Fuentes, and X González.

[70][71][72][69][73] Hunter Pollack, brother of victim Meadow, was scheduled to speak, but did not attend due to a logistical issue,[74] which he contended was a result of being misled by event officials.

[77] Other participants included Naomi Wadler, who is an elementary school student in Alexandria, Virginia,[78][79][80] Trevon Bosley from Chicago whose brother was shot and killed leaving church,[81] Edna Lizbeth Chávez, a high school student from Los Angeles,[82] and Zion Kelly, whose twin brother was shot and killed during an armed robbery.

[83] Yolanda Renee King, granddaughter of Martin Luther King Jr., also made an appearance[84] along with Mya Middleton, a student from Chicago representing After School Matters,[85] Matt Post, a senior from Montgomery County,[86] Christopher Underwood, an 11-year old from New York,[87] Alex King and D'Angelo McDade from Chicago,[88] and Matthew Soto, brother of Sandy Hook victim Victoria Soto,[89] and Parkland parents Lori Alhadeff, who lost her daughter Alyssa in the school incident[90] and Manuel & Patricia Oliver, whose lost their son Joaquin and launched a campaign titled "Change The Ref" to honor their son and push for new restrictions on any form of weapon violence.

[97][98] Singers Ariana Grande, Lin-Manuel Miranda, Ben Platt, Miley Cyrus, Jennifer Hudson, Andra Day, Common, Demi Lovato and Vic Mensa joined student-led marchers in Washington, D.C.[73][99] Throughout the nation, other participators who took to the stage or in the crowd in D.C. included Kanye West & Kim Kardashian, George & Amal Clooney, Glenn Close, Cher, Miley Cyrus' sister Noah, Steven Spielberg, Julianne Moore, and Lauren Jauregui of Fifth Harmony in D.C. as well as Arizona Representative Gabby Giffords, who survived weapon violence in the 2011 Tucson shooting and marching and paying tribute for the six victims who died at her Congressional Rally back then in 2011.

Celebs who took part in the rally in Los Angeles included Laura Dern, Reese Witherspoon, Olivia Wilde with Jason Sudeikis, Mason Cook, Jaden & Willow Smith, Yara Shahidi, Meg Donnelly, Roots Drummer Questlove, Amy Schumer, Lady Gaga, Charlie Puth, Mae Whitman, Connie Britton, Rita Ora, Ta'Rhonda Jones, Miles Heizer, Kendall & Kylie Jenner, Hailey Baldwin, Leona Lewis, Anjelica Huston, and singer and music executive Diane Warren along with city's mayor Eric Garcetti and Senator Kamala Harris.

(The song later became a music video on June 1, 2018, showing montage recap clips of protestors being guided by officers on motorcycle while Brandi is blending in with the crowd and is later seen performing on the front lawn of the Seattle Center.)

[112] Libertarian magazine Reason criticized the march, saying that "Gun violence has declined precipitously over the past 25 years, and most Americans are much safer today than they were a generation ago."

[123] Lady Gaga also documented the march, releasing a series of Instagram videos calling for action from politicians to enforce stricter gun laws.

BBH L.A. executive creative director Zach Hilder said, "we wanted to give them tools to elevate their voices, create a way to unify their message and allow everyone to participate in the march.

Although other social media platforms such as Twitter and Instagram often make posts to increase awareness, Facebook is more often used to organize people in nearby marches or demonstrations in major cities, and this has seen great success.

[132] The March For Our Lives movement leveraged Snapchat to gain momentum, spread the word and draw attention to what students and supporters were doing around the United States in response to recent shootings on school campuses.

[135] Jesse Hughes, a survivor of the Bataclan terrorist attack, called the march "pathetic", but after being criticized for his comment, later apologized saying, "I was not attempting to impugn the youth of America and this beautiful thing that they accomplished.

[144] In Connecticut, marches took place in Hartford,[145][146] East Haddam,[147] Enfield,[148] Guilford,[149] Middlebury, New Haven, Old Saybrook,[150] Pawcatuck, Roxbury, Salisbury, Shelton, Stamford[151] and Westport.

[179] In New York, demonstrations were held in Albany,[180] Binghamton,[181] Buffalo,[182] Cobleskill,[183] Ithaca,[184] Oneonta,[185] Rochester (Washington Square Park),[186] and White Plains.

[187] In New York City, where an estimated 200,000 people marched, the musician Paul McCartney cited the murder of John Lennon as motivation for joining the protests when he told a CNN journalist, "One of my best friends was killed in gun violence, so it's important to me.

"[188][189][190] In Pennsylvania, marches took place in Allentown,[191] Bloomsburg,[192] Doylestown,[193] Easton,[194] Erie,[195] Lancaster,[196] Philadelphia,[197] Pittsburgh,[198][199] Reading,[200] Scranton[201] and State College.

[245][246] In Cincinnati a rally took place at City Hall, which followed a performance with seventeen flutes made from shotgun barrels, as a memorial to the victims of the Parkland shooting.

[264] Notable speakers included John Phillips, the civil attorney of Jordan Davis, the seventeen year old who was shot and killed at a gas station in 2012 and Stranger Things actor Chester Rushing.

[280][281] The Mayor of Baltimore, Catherine Pugh also announced that she was organizing 60 free buses to take students to the demonstrations in Washington, D.C.[280] In North Carolina, marches were held in Asheville,[282] Charlotte,[283] Durham,[284] Raleigh,[285][286] Hendersonville,[287] and Wilmington.

[296] In Texas, demonstrations were held in Austin,[297][298] Corpus Christi,[299] Dallas,[300] El Paso, Fort Worth,[301] Houston, and San Antonio.

[357] Marches were planned for Shanghai and Hong Kong China, Mumbai and New Delhi, Tokyo and Okinawa, Mingora (Malala Yousafzai's hometown), Karachi and Islamabad, Pakistan as well as Kabul, Jakarta, Kuala Lumpur, Abu Dhabi, Dubai, and Manila.

[372][371][373] Protests were also held in Vienna, Paris, The Hague, Helsinki, Budapest, Bucharest, Sofia, Riga, Málaga, Lisbon, Warsaw, Minsk,[372] Majorca, Copenhagen,[374] and Brussels.

[378] New Zealand planned marches in Albert Park, Auckland; Parliament House, Wellington; Cathedral Square, Christchurch; and Union Hall at the University of Otago, Dunedin.