An official timeline of Haikyū!! was released in the 6-7th issue of Weekly Shōnen Jump’s 2020 series. This timeline provides a general outline of the events that took place from Volume 1 Chapter 1 to Volume 43 Chapter 379. It confirms that majority of the series took place during 2012 - 2013 and Hinata being born in 1996.
Additional details of the exact date certain events took place are gathered from the manga.
- January: Hinata (11 years old) sees the Little Giant play in the Spring Interhigh on TV.
- May ~ : Hinata (14 years old) plays Kageyama for the first time during his last official volleyball match in middle school.
- April: Hinata enrolls in Karasuno and finds Kageyama there.
- Practice match with Aoba Johsai High
- May: Practice match with Nekoma High
- June: Karasuno loses to Aoba Johsai in the third round of Interhigh
- Hinata turns 16 years old
- July: Tokyo training camp
- August: Spring Interhigh National Tournament Miyagi Prefecture Qualifying Rounds.
- October 25-27: Miyagi Prefecture Spring Interhigh Qualifier
- December: All-Japan Youth Training Camp and Miyagi Prefecture First Years Training Camp
- Practice match with Date Tech High School
- Kageyama turns 16 years old.
- 4th: Karasuno leaves for Tokyo 
- 5th: Karasuno vs. Tsubakihara Academy
- 6th: Karasuno vs. Inarizaki High
- 7th: Karasuno vs. Nekoma High and loses to Kamomedai High in the Spring Interhigh quarter-finals
- 8th: Fukurodani vs. Inubushi and Ichibayashi vs Kamomedai in the Spring Interhigh semi-finals
- 9th: Ichibayashi beats Fukurodani in the Final of Spring Interhigh
- June: Karasuno loses to Date Tech High in the final rounds of the Miyagi Prefecture Interhigh Qualifer.
- Hinata turns 17
- October: Karasuno earns a ticket to the Spring Interhigh
- January: Karasuno loses to Inarizaki High in the third round of the Spring Interhigh
- October: Karasuno qualifies for the next Spring Interhigh
- January: Karasuno loses to Itachiyama Institute in the semi-finals and places third nationally.
- March: Hinata and the others in the same year graduate
- April: Kageyama enters the V.League
- October: Kageyama's first V.League season
- April: Hinata goes to Brazil
- June: Hinata encounters Oikawa in Brazil
- Hinata turns 20 years old
- July: Kageyama makes his debut at the Olympics
- October ~: Hinata teams up with Heitor as a beach volleyball duo
- December ~: Hinata and Heitor play their last match together.
- March: Hinata returns to Japan
- November 17th: Hinata faces off against Kageyama in the V.League
- In the Japanese version, the date on Hirugami's phone indicates that the Black Jackals and Schweiden Adlers game took place on Saturday, November 17th, 2018. The English version mistakenly changes the date to November 11th. This is presumably an error since November 11th, 2018 was a Sunday.