| Date | Sport | Venue/Event | Status | Winner/s |
| 1–7 | Fencing |  2023 Pan American Cadets and Juniors Fencing Championships | Continental |  United States |
| 1–18 | Association football |  2023 AFC U-20 Asian Cup | Continental | Uzbekistan |
| 2–5 | Athletics |  2023 European Athletics Indoor Championships | Continental |  Norway |
| 2–5 | Speed skating |  2023 World Single Distances Speed Skating Championships | International | Netherlands |
| 3–5 | Motorcycle racing |  2023 WSBK Mandalika round | International | |
| 4 | Road bicycle racing |  2023 Strade Bianche (UCI World Tour #5) | International | |
| 4–12 | Biathlon |  Biathlon Junior World Championships 2023 | International |  Germany |
| 4–12 | Curling |  2023 World Wheelchair Curling Championship | International |  China |
| 4–12 | Curling | 2023 World Wheelchair Mixed Doubles Curling Championship | International |  Latvia |
| 5 | Formula racing |  2023 Bahrain Grand Prix (F1 #1) | International | Max Verstappen ( Red Bull Racing-Honda RBPT) |
| 5 | Marathon |  2023 Tokyo Marathon | International | |
| 5 | Mixed martial arts | UFC 285: Jones vs. Gane | International | Jon Jones |
| 5–12 | Road bicycle racing |  2023 Paris–Nice (UCI World Tour #6) | International |  Tadej Pogačar ( UAE Team Emirates) |
| 5–15 | Shooting |  2023 European 10 m Events Championships | Continental | Norway |
| 5 – 10 September | Indy car racing | / 2023 IndyCar Series | International | Drivers' champion:  Álex Palou |
| 6–11 | Six-red snooker |  2023 Six-red World Championship | International | Ding Junhui |
| 6–12 | Road bicycle racing | 2023 Tirreno–Adriatico (UCI World Tour #7) | International | Primož Roglič ( Team Jumbo–Visma) |
| 7 | Cross country running |  2023 Asian Cross Country Championships | Continental |  India |
| 8–19 | Tennis | 2023 Indian Wells Masters | International | |
| 8–21 | Baseball | / / 2023 World Baseball Classic | International | Japan |
| 9–12 | Golf | 2023 Players Championship | International | Scottie Scheffler |
| 10–12 | Short-track speed skating |  2023 World Short Track Speed Skating Championships | International | Netherlands |
| 11–12 | Athletics |  2023 European Throwing Cup | Continental |  Ukraine |
| 11–19 | Beach soccer |  2023 Copa América de Beach Soccer | Continental |  Brazil |
| 12–16 | Field hockey |  2023 Men's Hockey Junior Africa Cup
2023 Women's Hockey Junior Africa Cup | Continental | |
| 13–19 | Wrestling |  2023 European U23 Wrestling Championships | Continental |  Azerbaijan |
| 14 – 3 April | Basketball | 2023 NCAA Division I men's basketball tournament | Domestic |  UConn Huskies |
| 15 – 2 April | Basketball | 2023 NCAA Division I women's basketball tournament | Domestic |  LSU Tigers |
| 15–26 | Boxing | 2023 IBA Women's World Boxing Championships | International | India |
| 16–19 | Rallying |  2023 Rally Mexico (WRC #3) | International | |
| 16–26 | Beach soccer | 2023 AFC Beach Soccer Asian Cup | Continental |  Iran |
| 17 | Endurance racing | 2023 1000 Miles of Sebring (WEC #1) | International | |
| 17–19 | Futsal |  UEFA Women's Futsal Euro 2023 Finals | Continental | Spain |
| 18 | Road bicycle racing | 2023 Milan–San Remo (UCI World Tour #8) | International | Mathieu van der Poel ( Alpecin–Deceuninck) |
| 18 | Mixed martial arts |  UFC 286: Edwards vs. Usman 3 | International |  Leon Edwards |
| 18–26 | Curling |  2023 World Women's Curling Championship | International |  Switzerland |
| 19 | Formula racing |  2023 Saudi Arabian Grand Prix (F1 #2) | International | Sergio Pérez ( Red Bull Racing-Honda RBPT) |
| 19–25 | Air sports |  2023 FAI F3P World Championships | International | France |
| 20–26 | Figure skating | 2023 World Figure Skating Championships | International | Japan |
| 20–26 | Road bicycle racing | 2023 Volta a Catalunya (UCI World Tour #9) | International | Primož Roglič ( Team Jumbo–Visma) |
| 21–25 | Telemark skiing |  2023 World Telemarking Championships | International | Switzerland |
| 22 – 2 April | Tennis | 2023 Miami Open | International | |
| 22 | Road bicycle racing | 2023 Classic Brugge–De Panne (UCI World Tour #10) | International | |
| 22–26 | Golf | 2023 WGC Match Play | International | Sam Burns |
| 22–26 | Karate | 2023 European Karate Championships | Continental | Germany |
| 23–25 | Freestyle skiing | 2023 FIS Junior Freestyle Moguls Championship | International | United States |
| 24 | Road bicycle racing | 2023 E3 Saxo Classic (UCI World Tour #11) | International | Wout van Aert ( Team Jumbo–Visma) |
| 24–26 | Triathlon | 2023 World Triathlon Winter Championships | International | |
| 24–27 | Snowboarding |  2023 FIS Junior Snowboard Alpine World Championship | International | Bulgaria |
| 25 | Formula racing | 2023 São Paulo ePrix (FE #6) | International |  Mitch Evans ( Jaguar TCS Racing) |
| 25 | Horse racing | 2023 Dubai World Cup | International | |
| 25 – 1 April | Weightlifting |  2023 Youth World Weightlifting Championships | International | Turkey |
| 25 – 29 April | Rugby union | // // / 2023 Women's Six Nations Championship | Continental | England |
| 26 | Road bicycle racing | 2023 Gent–Wevelgem (UCI World Tour #12) | International | |
| 26 | Motorcycle racing | 2023 Portuguese motorcycle Grand Prix (MotoGP #1) | International | |
| 27–28 | Freestyle skiing | 2023 FIS Junior Freestyle Ski Cross World Championship | International | Switzerland |
| 27 – 1 April | Weightlifting | 2023 Pan American Weightlifting Championships | Continental | United States |
| 27 – 2 April | Snooker | 2023 Tour Championship (Players Series #3) | International | Shaun Murphy |
| 28 – 2 April | Bandy | 2023 Bandy World Championship
2023 Women's Bandy World Championship | International | |
| 29–30 | Freestyle skiing | 2023 FIS Junior Freestyle Ski Aerials World Championship | International | China |
| 29 – 2 April | 3x3 basketball |  2023 FIBA 3x3 Asia Cup | Continental | |
| 29 – 2 April | Gymnastics | 2023 Junior World Artistic Gymnastics Championships | International | Japan |
| 29 | Road bicycle racing | 2023 Dwars door Vlaanderen (UCI World Tour #13) | International | |
| 30–31 | Snowboarding | 2023 FIS Junior Snowboard Cross World Championship | International | France |
| 30 – 23 April | Association football |  2023 South American U-17 Championship | Continental | Brazil |
| 30 – 1 October | Baseball | / 2023 Major League Baseball season | Domestic | Texas Rangers |
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