In 1929, the Detroit Lions (then Portsmouth Spartans) and the Green Bay Packers played their first game against each other.
On July 12, 1930, the Portsmouth Spartans were founded in Portsmouth, Ohio and joined the NFL.
In 1930, Hal Griffen became the first head coach of the Detroit Lions.
In 1930, the Detroit Lions (then Portsmouth Spartans) and the Chicago Bears played their first game against each other.
In 1933, the Detroit Lions and Chicago Bears became division rivals.
In 1933, the Detroit Lions and Green Bay Packers became division rivals.
In 1934, team owner George A. Richards tasked Glenn Presnell, a player on the team, and his wife with selecting the team's colors. They chose Honolulu Blue and Silver, a combination inspired by the waves off the coast of Hawaii.
In 1934, the Lions owner negotiated a deal with NBC to broadcast their Thanksgiving game live, starting a tradition that continues today.
In 1934, the Portsmouth Spartans relocated to Detroit due to financial struggles and were renamed the Lions in reference to the city's Major League Baseball (MLB) franchise, the Detroit Tigers.
Upon moving to Detroit in 1934, the Lions adopted their now-iconic colors: Honolulu Blue and Silver.
The Detroit Lions won their first NFL Championship in 1935.
The Detroit Lions' 1994 throwback jerseys were modeled after the jerseys worn by the 1935 championship team.
In 1939, due to World War II, the Lions paused their tradition of playing on Thanksgiving.
In 1944, after a pause for World War II, the Lions resumed playing on Thanksgiving.
The Detroit Lions wore white pants without striping during the "scarlet and black" era of 1948 and 1949.
In 1948, then head coach Bo McMillin changed the Lions' team colors to scarlet and black, influenced by his time as a coach at Indiana.
The Detroit Lions' use of white pants during the "scarlet and black" era ended in 1949.
The Lions' brief change to scarlet and black lasted only until 1950, when the team reverted to their traditional colors.
Prior to 2023, the last time the Detroit Lions wore blue helmets was in 1955.
In 1956, the Lions added "TV numbers" to the sleeves of their jerseys to help TV broadcasters identify players from the line of scrimmage.
The Detroit Lions won their fourth and most recent NFL championship in 1957.
In 1961, the Detroit Lions and the Minnesota Vikings started playing twice a year when the Vikings joined the NFL.
The Detroit Lions introduced a new logo in 1961.
William Clay Ford became the owner of the Detroit Lions in 1963.
The Detroit Lions changed their logo in 1969.
In 1970, after the AFL-NFL merger, the rivalry between the Detroit Lions and Cleveland Browns cooled down due to the Browns' move to the American Football Conference.
In 1970, the Detroit Lions added white trim to their logo.
The Lions added outlines to the numbers on their jerseys in 1972, with white outlines on the blue jerseys and silver outlines on the white jerseys.
In 1977, the Detroit Lions and Tampa Bay Buccaneers became division opponents in the NFL Central.
The Lions reversed the color arrangement on the numbers of their blue jerseys in 1982.
In 1984, the Detroit Lions changed the facemasks on their helmets from silver to blue.
In 1988, Wayne Fontes began his time as the head coach of the Detroit Lions.
In 1991, the Detroit Lions broke their long playoff win drought, which had stretched since their championship win in 1957.
As part of a league-wide initiative, the Detroit Lions wore throwback jerseys in 1994, inspired by the jerseys worn during their 1935 championship season. These jerseys featured solid silver helmets and pants, Honolulu blue jerseys with silver numbers, solid blue socks, black cleats, and no "TV numbers" or logos on the helmets.
In 1996, Wayne Fontes ended his time as the longest-tenured head coach in Detroit Lions history.
For the 1998 season, the Detroit Lions wore blue pants with their white jerseys and grey socks, a combination they abandoned after the season ended.
The Detroit Lions' 2017 uniform redesign marked the return of the white jersey and blue pants combination, which had not been used since 1998.
In 1999, the Lions moved the "TV numbers" on their jerseys from the sleeves to the shoulders.
From 2001 to 2004, the Detroit Lions wore 1950s-style throwback jerseys for their traditional Thanksgiving Day games, as encouraged by the NFL.
In 2001, the Detroit Lions and Tampa Bay Buccaneers ended their time as division opponents in the NFL Central.
In 2002, the Detroit Lions and Cleveland Browns began playing an annual preseason game known as the "Great Lakes Classic".
In 2003, the Detroit Lions incorporated black trim into their logo and jerseys, and the facemasks on their helmets were changed from blue to black.
The Detroit Lions stopped wearing 1950s-style throwback jerseys for their Thanksgiving Day games after the 2004 season.
In 2005, the Detroit Lions introduced an alternate black jersey to their uniform rotation.
On November 9, 2008, the Lions honored their 75th Season All-Time Team during halftime against the Jacksonville Jaguars.
In 2008, the Detroit Lions dropped their black alternate jersey and introduced throwback uniforms to commemorate the franchise's 75th anniversary.
The Lions officially unveiled a new logo and uniforms on April 20, 2009. The logo was given a flowing mane and fangs, while the typeface featured a modern font.
In 2009, the Lions created the "Pride of the Lions", a ring of honor to recognize the franchise's greatest players.
William Clay Ford, owner of the Detroit Lions, passed away in 2014.
In 2014, the Detroit Lions and Cleveland Browns ended their tradition of playing an annual preseason game known as the "Great Lakes Classic".
In 2015, WJBK took over as the flagship station for the Detroit Lions' preseason games.
In 2015, the Lions announced their move from WXYT-FM to WJR for the 2016 season, marking the end of a 20-year partnership with CBS Radio.
The Detroit Lions announced a new typeface and logo on February 1, 2017, and completely removed the color black from their team identity.
On April 13, 2017, the Detroit Lions unveiled new uniforms that included a white jersey and blue pants combination for the first time since 1998.
On September 29, 2019, the Detroit Lions honored their All-Time Team during halftime against the Kansas City Chiefs in celebration of the NFL's centennial.
On January 20, 2021, Dan Campbell was hired as the head coach of the Detroit Lions.
On September 20, 2021, the Detroit Lions wore white pants without striping with their white road uniforms against the Green Bay Packers. This marked the return of the white pants, which had last been worn during the "scarlet and black" era in the 1948 and 1949 seasons.
In 2021, the Detroit Lions returned to WXYT-FM as their flagship station.
The Detroit Lions announced on April 12, 2023, that they would celebrate their 90th season in franchise history with a commemorative logo and jersey patch inspired by their logo from 1961 to 1969.
On June 21, 2023, the Detroit Lions unveiled an alternate blue helmet featuring the 1960s logo. It was paired with their grey uniform, marking the first time the Lions had worn a blue helmet since 1955.
In 2023, the Detroit Lions announced their lineup of announcers for preseason games on WJBK.
In 2023, the Lions won the NFC North division title, which influenced their decision to bring back a black alternate jersey.
The Detroit Lions won their first playoff game since the 1991 season in 2023.
On April 18, 2024, the Detroit Lions unveiled a new jersey set with home, away, and alternate options.
On May 13, 2024, the Detroit Lions updated their roster.