1900s-1920s

Note: This is copied over from the wiki and this is going to be added onto. The events in Italic are events that is not sporting releated.

1900s

 * 🇺🇸 October 13, 1903 - The first World Series ends in the Pittsburgh Pirates taking it out 5-4 over the Boston Americans.
 * 🇫🇷 May 21, 1904 - FIFA is formed in Paris, France.
 * 🇦🇺 November 26, 1905 - The finals of the first Australasian Championships is held in Melbourne with Rodney Heath winning the singles while the Australian pair of E.T. Barnard and Basil Spence wins the doubles.
 * 🇫🇷 April 9-May 13, 1906 - The 1906 FIFA World Cup is held in France.
 * 🇫🇷 May 13, 1906 - Uruguay wins the first FIFA World Cup after defeating Austria 4-0 in the final
 * 🇫🇷 June 27, 1906 - The first French Grand Prix finishes in Le Mans with Ferenc Szisz winning the Grand Prix.
 * 🏴󠁧󠁢󠁥󠁮󠁧󠁿 1907 - Manchester United goes bust.
 * 🇦🇺 September 28, 1907 - Championship of Australia is held for the first time in 11 years with Norwood (SAFA) defeating Essendon
 * 🇬🇧 1908 - Netherlands wins the football tournament in London to get their first gold medal.
 * 🇬🇧 April 27-October 31, 1908 - 1908 Summer Olympics is held in London, United Kingdom.
 * 🇦🇺 December 12, 1908 - At the 1908 Australasian Championships, Fred Alexander becomes the first non-Australasian player to make the final before losing to Alfred Dunlop in five sets.
 * 🇬🇧 January 16, 1909 - France joins the Five Nations Championship after playing against the other British nations between 1906 to 1908.
 * 🇮🇹 May 30, 1909 - The first Giro d'Italia ends in Milan with Luigi Ganna winning the tour by one point.
 * 🏴󠁧󠁢󠁥󠁮󠁧󠁿 July 3, 1909 - The Imperial Cricket Council holds their first meeting in London with the discussion being about creating the World Test Championship to start in 1909.

1910s

 * 🇦🇹 April 10-27, 1910 - The 1910 FIFA World Cup is held in Austria.
 * 🇦🇹 April 14, 1910 - becomes the first player to score a hat-trick in a FIFA World Cup as  defeat  4-0.
 * 🇦🇹 April 27, 1910 - England wins their first World Cup after defeating Belgium 2-1.
 * 🇳🇴 1910 - The Nordic Football Championship is held in Norway.
 * 🇺🇸 May 30, 1911 - The first Indianapolis 500 is held
 * 🏴󠁧󠁢󠁥󠁮󠁧󠁿 April 27, 1912 - Everton becomes the first team to win back to back Football League titles
 * 🏴󠁧󠁢󠁥󠁮󠁧󠁿 May 27-July 31, 1912 - The first World Test Championship is held in England.
 * 🇸🇪 July 4, 1912 - Netherlands defends the Olympic football title in Stockholm.
 * 🇸🇪 July 6-22, 1912 - The 1912 Summer Olympics is held in Stockholm, Sweden.
 * 🇳🇿 January 1, 1913 - Arthur Lowe becomes the first Australian Championship champion to not come from Australasian region as he defeated fellow Brit Charles Dixon in five sets.
 * 🇺🇸 February 4-11, 1913 - The first Far Eastern Championship Games is held in Manila, Philippines
 * 🇬🇧 July 28, 1913 - Canada shock the tennis world by defeating the British Isles 3-2 in the International Lawn Tennis Challenge.
 * 🇳🇴 December 2, 1913 - The first FIFA World Cup qualifier is played in Oslo with Norway and Finland finishing with a 2-2 draw.
 * February 27, 1914 - The last Swiss Tri Tournament is held with Argentina winning the last tournament.
 * 🏴󠁧󠁢󠁥󠁮󠁧󠁿 April 5-25, 1914 - The 1914 FIFA World Cup is held in England.
 * 🏴󠁧󠁢󠁥󠁮󠁧󠁿 April 25, 1914 - Denmark cause a upset in the World Cup final by defeating England in extra time.
 * 🇺🇸 May 30, 1914 - Josef Christiaen becomes the first winner of the Indianapolis 500 to not come from the United States.
 * July 28, 1914 - World War I starts
 * 🇧🇷 September 14, 1916 - CONMEBOL is formed in Sao Paulo
 * 🇨🇦 December 19, 1917 - The first National Hockey League season begins in Canada.
 * 🇧🇷 May 18, 1918 - Copa América first tournament is held in Brazil.
 * November 11, 1918 - World War I ends

1920s

 * 🇧🇪 August 12-September 2, 1920 - The 1920 Summer Olympics is held in Antwerp, Belgium
 * 🇧🇪 August 29, 1920 - is disqualified from the 1920 edition after walking off from the field in the quarter-final against Norway.
 * 🇧🇪 September 2, 1920 - Belgium defeats the Netherlands 2-1 in the Olympic final
 * August 4, 1921 - The first UCI Road World Championships is held in Copenhagen with Swedish rider, Gunnar Skoeld taking out the race.
 * May 10-20, 1922 - The 1922 FIFA World Cup is held in the Netherlands
 * May 20, 1922 - Belgium wins their first FIFA World Cup title after defeating Netherlands 2-1.
 * 🇫🇷 May 27, 1923 - The first edition of the 24 Hours of Le Mans is held with André Lagache and René Léonard taking out the win.
 * 🇫🇷 January 25-February 5, 1924 - The first Winter Olympics is held in Chamoix, France.
 * 🇫🇷 May 4-July 27, 1924 - The 1924 Summer Olympics is held in Paris, France.
 * 🇫🇷 June 9, 1924 - defeats Italy 1-0 in the Olympic final.
 * 🇺🇸 July 4, 1924 - The first American team is formed in the National Hockey League with the Boston Bruins being formed.
 * 🇫🇷 April 13, 1925 - France wins their first Five Nations Championship after defeating England in the final match.
 * 🇮🇹 June 7, 1925 - Alfredo Binda wins his first Giro d'Italia of six titles that he would win between 1925 and 1933.
 * 🇧🇪 June 25, 1925 - The first Belgian Grand Prix is held at the Spa-Francorchamps.
 * 🇪🇸 May 10-June 1, 1926 - The 1926 FIFA World Cup is held in Spain.
 * 🇪🇸 June 1, 1926 - Uruguay becomes the first team to win FIFA World Cup twice after defeating the Netherlands 3-2 in extra time.
 * 🇦🇺 September 18, 1926 - Port Melbourne wins their first VFA premiership, the first of what will be four in a row.
 * 🇬🇧 December 11, 1926 - The first World Table Tennis Championships conclude in London, United Kingdom.
 * 🏴󠁧󠁢󠁥󠁮󠁧󠁿 August 9, 1927 - The first British League Cup is held in London with Belfast Celtic F.C defeating Rangers 2-0 in the final.
 * 🇱🇹 August 10, 1927 - wins the first Baltic Cup.
 * September 2, 1927 - The first Mitropa Cup is held.
 * February 11-19, 1928 - The 1928 Winter Olympics is held in St. Moritz, Switzerland.
 * June 10, 1928 - Italy defeats Uruguay 2-0 in a repeat of the 1924 Olympic Final in Amsterdam.
 * June 16, 1928 - The first FIFA World Rankings is revealed with the Netherlands on top.
 * July 28-August 12, 1928 - The 1928 Summer Olympics is held in Amsterdam, Netherlands.
 * 🇪🇬 April 6, 1929 - Egypt becomes the first team from Africa to qualify through to the World Cup.
 * 🇨🇦 June 5, 1929 - Talks from the Dominion of Canada Football Association and the British FA's bring about football at the British Empire Games.
 * April 7, 1929 - The first Monaco Grand Prix is held with Georges Bouriano taking the victory
 * 🇮🇹 October 6, 1929 - The first games of the new Serie A is played in Italy.
 * 🇪🇸 December 1, 1929 - The first games of the new La Liga is played in Spain.