This is a timeline of Why Don't We's musical career, in chronological order, including significant events. This is used as a reference guide, but may contain inaccurate dates due to human err.
1998[]
- June 16, 1998: Jonah Marais Roth Frantzich is born.
- November 25, 1998: Corbyn Matthew Besson is born.
1999[]
- April 2, 1999: Daniel James Seavey is born.
- July 1, 1999: Jack Robert Avery is born.
2001[]
- May 27, 2001: Zachary Dean Herron is born.
2014[]
- April 2, 2014: Daniel Seavey is eliminated on American Idol.
2015[]
- January 1, 2015: Daniel Seavey's recording of "You Make My Dreams" is released.
- January 14, 2015: Jonah Marais and Alyssa Shouse's cover of One Direction's "Little Things" is released.
- January 17, 2015: Music video for Jonah Marais and Alyssa Shouse's cover of One Direction's "Little Things" is released.
- January 24, 2015: Jonah Marais' cover of One Direction's "Night Changes" is released.
- April 25, 2015: Daniel Seavey's cover of Marvin Gaye's "How Sweet It Is (To Be Loved by You)" is released.
- April 26, 2015: Daniel Seavey's cover of Maroon 5's "Sunday Morning" is released.
- July 7, 2015: Jonah Marais releases his debut single, "I Meant It".
- July 14, 2015: Daniel Seavey and Lovey James' cover of Charlie Puth's "See You Again" is released.
- July 31, 2015: Jack Avery appears in the web film, The Fearless Five.
- August 2, 2015: Daniel Seavey's cover of The Weeknd's "Can't Feel My Face" is released.
- August 9, 2015: The music video for "I Meant It" is released.
2016[]
- January 13, 2016: Jack Avery releases his debut single "Liar".
- January 22, 2016: Zach Herron releases his debut single "Timelapse".
- February 2, 2016: Daniel Seavey's cover of Allen Stone's "Unaware" is released.
- February 27, 2016: Daniel Seavey's cover of Édith Piaf's "La Vie en Rose" is released.
- March 19, 2016: Jonah Marais single, "War Paint", is released.
- April 2, 2016: Jonah Marais releases his debut EP, When the Daylight's Gone.
- June 3, 2016: Zach Herron releases his sophomore single "Why".
- June 28, 2016: Daniel Seavey's cover of Shawn Mendes' "Treat You Better" is released.
- July 26, 2016: Daniel Seavey's cover of Troye Sivan's "Youth" is released.
- August 31, 2016: Daniel Seavey and Lovey James' cover of Little Mix's "Secret Love Song" is released.
- September 23, 2016: Jonah Marais featuring The Potash Twins' "Next Ex Girlfriend" is released.
- September 27, 2016: Why Don't We are officially announced.
- October 6, 2016: Their single "Taking You" is released.
- November 4, 2016: Their single "Nobody Gotta Know" is released.
- November 10, 2016: The music video for "Nobody Gotta Know" is released.
- November 24, 2016: Their single "You and Me at Christmas" is released.
- November 25, 2016: Only the Beginning is released.
2017[]
- January 27, 2017: They begin their Taking You Tour in Burnsville, Minneapolis.
- February 14, 2017: Daniel Seavey and Makaena Durias's single "Best with Two" is released.
- February 25, 2017: They complete their Taking You Tour in Anaheim, California.
- March 27, 2017: A new music video for "Nobody Gotta Know" is released.
- April 7, 2017: Their single "Something Different" is released.
- April 21, 2017: Their extended play Something Different is released.
- May 18, 2017: Their single with Logan Paul, "Help Me Help You", is released.
- June 2, 2017: Their extended play Why Don't We Just is released.
- June 3, 2017: Their single with Logan Paul, "The Fall of Jake Paul", is released.
- July 9, 2017: The music video for "The Fall of Jake Paul" is released.
- July 11, 2017: They begin the Something Different Tour in Atlanta, Georgia.
- August 12, 2017: They complete their Something Different Tour in Nashville, Tennessee.
- August 30, 2017: Their single "These Girls" is released.
- September 26, 2017: Their extended play Invitation is released.
- September 27, 2017: One year of the band.
- October 6, 2017: The music video for "Invitation" is released.
- November 23, 2017: Their extended play A Why Don't We Christmas is released.
- November 25, 2017: The music video for "Kiss You This Christmas" is released.
2018[]
- February 1, 2018: Their single "Trust Fund Baby" is released.
- February 27, 2018: First date of their Invitation Tour in Cincinnati, Ohio.
- March 1, 2018: The music video for "Trust Fund Baby" is released.
- April 19, 2018: The acoustic version of "Trust Fund Baby" is released.
- June 7, 2018: Their single "Hooked" is released.
- July 6, 2018: Their single "Talk" is released.
- August 4, 2018: They perform at the event, Show of the Summer.
- August 9, 2018: Their single "8 Letters" is released.
- August 19, 2018: The music video for "8 Letters" is released.
- August 31, 2018: Their studio album 8 Letters is released.
- September 27, 2018: Two years of the band.
- October 4, 2018: The acoustic version of "8 Letters" is released.
- October 6, 2018: The music video for their acoustic version of "8 Letters" is released.
- October 24, 2018: Their extended play Spotify Singles is released.
2019[]
- January 16, 2019: Their single "Big Plans" is released.
- January 19, 2019: The music video for "Big Plans" is released.
- February 7, 2019: They perform on Jimmy Kimmel Live!.
- February 14, 2019: Their single "Cold in LA" is released.
- March 20, 2019: Their single "I Don't Belong in This Club" is released and they embark on the first date of their 8 Letters Tour in Phoenix, Arizona.
- April 19, 2019: Their single "Don't Change" is released.
- May 16, 2019: Their single "Unbelievable" is released.
- May 25, 2019: The music video for "Unbelievable" is released.
- June 18, 2019: They announce "8 Letters" has been certified gold.
- June 28, 2019: Their single "Come to Brazil" is released.
- June 30, 2019: They perform "I Don't Belong in This Club" at the Logie Awards.
- July 25, 2019: Their single "I Still Do" is released.
- August 23, 2019: Their single "What Am I" is released.
- September 2, 2019: They perform on the Today show.
- September 26, 2019: Their acoustic version of "What Am I" is released.
- September 27, 2019: Three years of the band.
- October 19, 2019: The Dak and Brody YouTube channel is created.
- October 25, 2019: Their single "Mad at You" is released.
- November 29, 2019: Their single "With You This Christmas" is released.
- December 30, 2019: Their single "Chills" is released.
2020[]
- January 5, 2020: The music video for "Chills" is released.
- September 27, 2020: Four years of the band.
- September 29, 2020: Their single "Fallin' (Adrenaline)" is released.
- November 6, 2020: They perform on Jimmy Kimmel Live!.
- November 12, 2020: They perform on The Ellen DeGeneres Show.
- December 4, 2020: Their single "Lotus Inn" is released.
- December 7, 2020: The music video for "Lotus Inn" is released.
- December 17, 2020: Their single "Slow Down" is released.
2021[]
- January 15, 2021: Their studio album The Good Times and The Bad Ones is released.
- March 26, 2021: Their extended play The Good Times is released.
- April 16, 2021: Their extended play The Bad Ones is released.
- September 27, 2021: Five years of the band.
- October 6, 2021: Their single "Love Back" is released.
- November 12, 2021: Their single "Mistletoe" is released.
2022[]
- January 7, 2022: Their single with Jonas Blue, "Don't Wake Me Up", is released.
- January 27, 2022: The music video for "Don't Wake Me Up" is released.
- April 14, 2022: Their single "Let Me Down Easy (Lie)" is released.
- May 13, 2022: Their single and music video for Just Friends is released.
- May 31, 2022: Their single and music video for "How Do You Love Somebody" is released.
- June 15, 2022: Their The Good Times Only Tour launch party was held in New York City.
- June 17, 2022: The first date of their The Good Times Only Tour was scheduled to begin in Tusla, Oklahoma.
- August 24, 2022: Planned to be the last date of their The Good Times Only Tour in Las Vegas, Nevada.
- July 7, 2022: Why Don't We announce cancellation of The Good Times Only Tour and indefinite hiatus of the band.
- September 27, 2022: Six years of the band.
- September 30, 2022: Seavey releases his debut solo single, "Can We Pretend That We're Good?".
- December 9, 2022: Seavey releases his sophomore single, "Runaway".
2023[]
- January 3, 2023: The first date of Seavey's Introducing Daniel Seavey tour began in Phoenix, Arizona.
- January 13, 2023: Seavey single I Tried is released.
- January 29, 2023: Seavey completes his North American tour in Los Angeles, California.
- September 27, 2023: Seven years of the band.