| European Championships – Men – 800 m freestyle | 2021 |  | 22 May |
| Europe – Champions Cup | 2021 | | 12 December–22 May |
| European Championships – Women – 100 m freestyle | 2021 | | 22 May |
| European Championships – Mixed – 4x100 m freestyle | 2021 | | 22 May |
| European Championships – Men – 200 m backstroke | 2021 | | 22 May |
| European Championships – Women – 200 m medley | 2021 | | 22 May |
| Europe – Champions Cup (Final) | 2021 | | 22 May |
| European Championships – Men – 50 m breaststroke | 2021 | | 22 May |
| European Championships – Women – 200 m breaststroke | 2021 | | 21 May |
| European Championships – Women – 4x200 m freestyle | 2021 | | 21 May |
| European Championships – Women – 1500 m freestyle | 2021 | | 21 May |
| European Championships – Women – 100 m backstroke | 2021 | | 21 May |
| European Championships – Men – 50 m butterfly | 2021 | | 21 May |
| European Championships – Men – 200 m freestyle | 2021 | | 21 May |
| Europe – Challenge Cup | 2021 | | 11 December–21 May |
| European Championships – Men – 100 m backstroke | 2021 | | 20 May |
| European Championships – Mixed – 4x100 m medley | 2021 | | 20 May |
| European Championships – Men – 200 m breaststroke | 2021 | | 20 May |
| European Championships – Women – 200 m butterfly | 2021 | | 20 May |
| European Championships – Men – 200 m medley | 2021 | | 20 May |
| European Championships – Women – 200 m freestyle | 2021 | | 20 May |
| European Championships – Men – 4x200 m freestyle | 2021 | | 19 May |
| European Championships – Men – 100 m freestyle | 2021 | | 19 May |
| European Championships – Men – 1500 m freestyle | 2021 | | 19 May |
| European Championships – Men – 200 m butterfly | 2021 | | 19 May |
| European Championships – Women – 50 m backstroke | 2021 | | 19 May |
| National cups – France – Coupe de France | 2021 | | 19 May |
| European Championships – Women – 100 m breaststroke | 2021 | | 19 May |
| European Championships – Women – 50 m freestyle | 2021 | | 18 May |
| European Championships – Mixed – 4x200 m freestyle | 2021 | | 18 May |
| European Championships – Women – 100 m butterfly | 2021 | | 18 May |
| European Championships – Women – 800 m freestyle | 2021 | | 18 May |
| European Championships – Men – 50 m backstroke | 2021 | | 18 May |
| European Championships – Men – 100 m breaststroke | 2021 | | 18 May |
| European Championships – Men – 400 m freestyle | 2021 | | 17 May |
| European Championships – Women – 4x100 m freestyle | 2021 | | 17 May |
| European Championships – Men – 4x100 m freestyle | 2021 | | 17 May |
| European Championships – Women – 400 m medley | 2021 | | 17 May |
| ATP Tour – ATP Masters 1000 – Rome | 2021 | | 9–16 May |
| Ultimate Fighting Championship – Men – Lightweight | 2021 | | 15 May |
| ATP Tour – ATP Masters 1000 – Madrid | 2021 | | 2–9 May |
| Formula 1 – Grand Prix – Spanish Grand Prix | 2021 | | 9 May |
| World Championship – Results | 2021 | | 17 April–3 May |
| Europe – Champions Cup (Semifinal #2) | 2021 | | 2 May |
| Formula 1 – Grand Prix – Portuguese Grand Prix | 2021 | | 2 May |
| NFL – Draft | 2021 | | 30 April–1 May |
| Europe – Champions Cup (Semifinal #1) | 2021 | | 1 May |
| National championships – France – Men | 2021 | | 25 April |
| UCI World Tour – Liège-Bastogne-Liège | 2021 | | 25 April |
| World Rally Championship (WRC) – Rallies – Rally Croatia | 2021 | | 22–25 April |
| Ultimate Fighting Championship – Women – Strawweight | 2021 | | 24 April |
| Ultimate Fighting Championship – Men – Welterweight | 2021 | | 24 April |
| Ultimate Fighting Championship – Women – Flyweight | 2021 | | 24 April |
| UCI World Tour – Flèche Wallonne | 2021 | | 21 April |
| UCI World Tour – Amstel Gold Race | 2021 | | 18 April |
| Formula 1 – Grand Prix – Emilia Romagna Grand Prix | 2021 | | 18 April |
| ATP Tour – ATP Masters 1000 – Monte Carlo | 2021 | | 11–18 April |
| Europe – Champions Cup (Quarterfinal #2) | 2021 | | 11 April |
| PGA Tour – Majors – Masters | 2021 | | 8–11 April |
| Europe – Champions Cup (Quarterfinal #1) | 2021 | | 11 April |
| Europe – Champions Cup (Quarterfinal #4) | 2021 | | 10 April |
| Europe – Champions Cup (Quarterfinal #3) | 2021 | | 10 April |
| UCI World Tour – Tour of Flanders | 2021 | | 4 April |
| ATP Tour – ATP Masters 1000 – Miami | 2021 | | 23 March–4 April |
| Formula 1 – Grand Prix – Bahrain Grand Prix | 2021 | | 28 March |
| National championships – Celtic League – Results | 2021 | | 2 October–28 March |
| UCI World Tour – Gent-Welvegem | 2021 | | 28 March |
| Honbasho – Haru Basho (March) | 2021 | | 14–28 March |
| Ultimate Fighting Championship – Men – Heavyweight | 2021 | | 27 March |
| Europe – Six Nations Championship (Round 3) | 2021 | | 26 March |
| Europe – Six Nations Championship | 2021 | | 6 February–26 March |
| UCI World Tour – Milan-San Remo | 2021 | | 20 March |
| Europe – Six Nations Championship (Round 5) | 2021 | | 20 March |
| ATP Tour – ATP Masters 500 – Acapulco | 2021 | | 15–20 March |
| Europe – Six Nations Championship (Round 5) | 2021 | | 20 March |
| Europe – Six Nations Championship (Round 5) | 2021 | | 20 March |
| America's cup – Results | 2021 | | 10–17 March |
| World Championships – Men – Big air | 2021 | | 16 March |
| World Championships – Women – Big air | 2021 | | 16 March |
| UCI World Tour – Paris-Nice | 2021 | | 7–14 March |
| Europe – Six Nations Championship (Round 4) | 2021 | | 14 March |
| World Championships – Men – Half-pipe | 2021 | | 13 March |
| Europe – Six Nations Championship (Round 4) | 2021 | | 13 March |
| Europe – Six Nations Championship (Round 4) | 2021 | | 13 March |
| World Championships – Women – Half-pipe | 2021 | | 13 March |
| World Championships – Men – Slopestyle | 2021 | | 12 March |
| World Championships – Women – Slopestyle | 2021 | | 12 March |
| World Championships – Men – 50 km | 2021 | | 7 March |
| NBA – All-star game – Results | 2021 | | 7 March |
| UCI World Tour – Strade Bianche | 2021 | | 6 March |
| World Championships – Men – Large hill, team | 2021 | | 6 March |
| Ultimate Fighting Championship – Women – Featherweight | 2021 | | 6 March |
| Ultimate Fighting Championship – Men – Bantamweight | 2021 | | 6 March |
| Ultimate Fighting Championship – Men – Light-heavyweight | 2021 | | 6 March |
| World Championships – Women – 30 km | 2021 | | 6 March |
| World Championships – Men – Large hill, team | 2021 | | 6 March |
| World Championships – Men – 4x10 km relay | 2021 | | 5 March |
| World Championships – Men – Large hill, individual | 2021 | | 5 March |
| World – Vendée Globe | 2021 | | 8 November–5 March |
| World Championships – Women – 4x5 km relay | 2021 | | 4 March |
| World Championships – Men – Large hill, individual | 2021 | | 4 March |
| World Championships – Women – Large hill, individual | 2021 | | 3 March |
| World Championships – Men – 15 km | 2021 | | 3 March |
| World Championships – Women – Parallel slalom | 2021 | | 2 March |
| World Championships – Men – Parallel slalom | 2021 | | 2 March |
| World Championships – Women – 10 km | 2021 | | 2 March |
| World Championships – Men – Parallel giant slalom | 2021 | | 1 March |
| World Championships – Women – Parallel giant slalom | 2021 | | 1 March |
| World Championships – Mixed – Normal hill, team | 2021 | | 28 February |
| World Championships – Mixed – Normal hill, team | 2021 | | 28 February |
| World Championships – Women – Team sprint | 2021 | | 28 February |
| World Rally Championship (WRC) – Rallies – Rally Finland | 2021 | | 26–28 February |
| World Championships – Men – Team sprint | 2021 | | 28 February |
| World Championships – Men – 30 km | 2021 | | 27 February |
| Europe – Six Nations Championship (Round 3) | 2021 | | 27 February |
| World Championships – Women – 15 km | 2021 | | 27 February |
| World Championships – Men – Normal hill, individual | 2021 | | 27 February |
| World Championships – Women – Normal hill, individual | 2021 | | 27 February |
| Europe – Six Nations Championship (Round 3) | 2021 | | 27 February |
| World Championships – Men – Normal hill, individual | 2021 | | 26 February |
| World Championships – Women – Normal hill, team | 2021 | | 26 February |
| World Championships – Men – 1.5 km sprint | 2021 | | 25 February |
| World Championships – Women – 1.5 km sprint | 2021 | | 25 February |
| World Championships – Women – Normal hill, individual | 2021 | | 25 February |
| World Championships – Men – Slalom | 2021 | | 21 February |
| World Championships – Women – 12.5 km mass start | 2021 | | 21 February |
| ATP Tour – Grand Slam – Australian Open (Final) | 2021 | | 21 February |
| World Championships – Men – 15 km mass start | 2021 | | 21 February |
| ATP Tour – Grand Slam – Australian Open | 2021 | | 8–21 February |
| WTA Tour – Grand Slam – Australian Open (Final) | 2021 | | 20 February |
| World Championships – Women – 4x7.5 km relay | 2021 | | 20 February |
| World Championships – Women – Slalom | 2021 | | 20 February |
| WTA Tour – Grand Slam – Australian Open | 2021 | | 8–20 February |
| World Championships – Men – 4x7.5 km relay | 2021 | | 20 February |
| World Championships – Men – Giant slalom | 2021 | | 19 February |
| ATP Tour – Grand Slam – Australian Open (Semifinal #2) | 2021 | | 19 February |
| ATP Tour – Grand Slam – Australian Open (Semifinal #1) | 2021 | | 19 February |
| WTA Tour – Grand Slam – Australian Open (Semifinal #2) | 2021 | | 18 February |
| WTA Tour – Grand Slam – Australian Open (Semifinal #1) | 2021 | | 18 February |
| World Championships – Mixed – Single mixed relay | 2021 | | 18 February |
| World Championships – Women – Giant slalom | 2021 | | 18 February |
| ATP Tour – Grand Slam – Australian Open (Quarterfinal #3) | 2021 | | 17 February |
| ATP Tour – Grand Slam – Australian Open (Quarterfinal #2) | 2021 | | 17 February |
| ATP Tour – Grand Slam – Australian Open (Quarterfinal #1) | 2021 | | 17 February |
| World Championships – Men – 20 km individual | 2021 | | 17 February |
| World Championships – Mixed – Team event | 2021 | | 17 February |
| ATP Tour – Grand Slam – Australian Open (Quarterfinal #4) | 2021 | | 17 February |
| World Championships – Men – Parallel giant slalom | 2021 | | 16 February |
| WTA Tour – Grand Slam – Australian Open (Quarterfinal #2) | 2021 | | 16 February |
| World Championships – Women – Parallel giant slalom | 2021 | | 16 February |
| World Championships – Women – 15 km individual | 2021 | | 16 February |
| WTA Tour – Grand Slam – Australian Open (Quarterfinal #4) | 2021 | | 16 February |
| WTA Tour – Grand Slam – Australian Open (Quarterfinal #3) | 2021 | | 16 February |
| WTA Tour – Grand Slam – Australian Open (Quarterfinal #1) | 2021 | | 16 February |
| World Championships – Men – Combined | 2021 | | 15 February |
| World Championships – Women – Combined | 2021 | | 15 February |
| World Championships – Men – 1500 m | 2021 | | 14 February |
| Europe – Six Nations Championship (Round 2) | 2021 | | 14 February |
| World Championships – Men – Downhill | 2021 | | 14 February |
| World Championships – Women – 5000 m | 2021 | | 14 February |
| World Championships – Women – 1500 m | 2021 | | 14 February |
| World Championships – Men – Four-man | 2021 | | 13–14 February |
| World Championships – Men – 12.5 km pursuit | 2021 | | 14 February |
| World Championships – Women – 10 km pursuit | 2021 | | 14 February |
| World Championships – Women – Monobob | 2021 | | 13–14 February |
| World Championships – Men – 10000 m | 2021 | | 14 February |
| World Championships – Women – Mass start | 2021 | | 13 February |
| World Championships – Women – 1000 m | 2021 | | 13 February |
| World Championships – Men – Mass start | 2021 | | 13 February |
| World Championships – Men – 1000 m | 2021 | | 13 February |
| World Championships – Women – 7.5 km sprint | 2021 | | 13 February |
| Europe – Six Nations Championship (Round 2) | 2021 | | 13 February |
| World Championships – Women – Downhill | 2021 | | 13 February |
| Europe – Six Nations Championship (Round 2) | 2021 | | 13 February |
| Ultimate Fighting Championship – Men – Welterweight | 2021 | | 13 February |
| World Championships – Women – Team pursuit | 2021 | | 12 February |
| World Championships – Men – 10 km sprint | 2021 | | 12 February |
| World Championships – Men – 500 m | 2021 | | 12 February |
| World Championships – Men – Team pursuit | 2021 | | 12 February |
| World Championships – Women – 500 m | 2021 | | 12 February |
| World Championships – Mixed – Team snowboardcross | 2021 | | 12 February |
| World Championships – Men – Snowboardcross | 2021 | | 11 February |
| World Championships – Women – Snowboardcross | 2021 | | 11 February |
| World Championships – Men – 5000 m | 2021 | | 11 February |
| World Championships – Women – 3000 m | 2021 | | 11 February |
| Others – Fifa Club World Cup | 2021 | | 4–11 February |
| World Championships – Women – Super-G | 2021 | | 11 February |
| World Championships – Men – Super-G | 2021 | | 11 February |
| World Championships – Mixed – Mixed relay | 2021 | | 10 February |
| NFL – Championships – Super Bowl – Results (Super Bowl) | 2021 | | 7 February |
| Europe – Six Nations Championship (Round 1) | 2021 | | 7 February |
| World Championships – Men – Two-man | 2021 | | 6–7 February |
| NFL – Championships – Super Bowl – Results | 2021 | | 7 February |
| Europe – Six Nations Championship (Round 1) | 2021 | | 6 February |
| Europe – Six Nations Championship (Round 1) | 2021 | | 6 February |
| World Championships – Women – Two-woman | 2021 | | 5–6 February |
| World Championships – Women – Singles | 2021 | | 31 January |
| World Championships – Men – Results | 2021 | | 13–31 January |
| World Championships – Mixed – Team relay | 2021 | | 31 January |
| Continental cups (clubs) – America – Copa Libertadores | 2020 | | 21 January–30 January |
| World Championships – Men – Doubles | 2021 | | 30 January |
| World Championships – Men – Singles | 2021 | | 30 January |
| World Championships – Women – Sprint | 2021 | | 29 January |
| World Championships – Men – Sprint | 2021 | | 29 January |
| World Championships – Men – Sprint, doubles | 2021 | | 29 January |
| Honbasho – Hatsu Basho (January) | 2021 | | 10–24 January |
| NFL – Championships – Super Bowl – Results (NFC Championship) | 2021 | | 24 January |
| World Rally Championship (WRC) – Rallies – Rally Monte-Carlo | 2021 | | 21–24 January |
| NFL – Championships – Super Bowl – Results (AFC Championship) | 2021 | | 24 January |
| NFL – Championships – Super Bowl – Results (NFC Divisional #1) | 2021 | | 17 January |
| NFL – Championships – Super Bowl – Results (AFC Divisional #2) | 2021 | | 17 January |
| NFL – Championships – Super Bowl – Results (NFC Divisional #2) | 2021 | | 16 January |
| NFL – Championships – Super Bowl – Results (AFC Divisional #1) | 2021 | | 16 January |
| Rally Raid – Dakar Rally | 2021 | | 3–15 January |
| Rally Raid – Dakar Rally | 2021 | | 3–15 January |
| Rally Raid – Dakar Rally | 2021 | | 3–15 January |
| NFL – Championships – Super Bowl – Results (AFC Wild Card) | 2021 | | 10 January |
| NFL – Championships – Super Bowl – Results (AFC Wild Card) | 2021 | | 10 January |
| NFL – Championships – Super Bowl – Results (NFC Wild Card) | 2021 | | 10 January |
| NFL – Championships – Super Bowl – Results (NFC Wild Card) | 2021 | | 9 January |
| NFL – Championships – Super Bowl – Results (NFC Wild Card) | 2021 | | 9 January |
| NFL – Championships – Super Bowl – Results (AFC Wild Card) | 2021 | | 9 January |
| Four hills tournament – Men – General standings | 2021 | | 28 December–6 January |
| World Series of Poker – Main event | 2020 | | 29 November–3 January |
| World Championship – Men | 2021 | | 15 December–3 January |
| World Championships – Singles | 2020 | | 31 December |
| Continental cups (clubs) – Men – Champions League | 2020 | | 11 September–29 December |
| Formula 1 – Grand Prix – Abu Dhabi Grand Prix | 2020 | | 13 December |
| Ultimate Fighting Championship – Men – Flyweight | 2020 | | 12 December |
| World Championship – Men – Heavyweight | 2020 | | 12 December |
Past events
