| 12. - 14.12.2025 | 4. World Cup 2025/2026 Highlight Hamar (NOR) 12. - 14.12.2025 | Hamar (NOR) |
| 12. - 14.12.2025 | Inzell (GER) 12. - 14.12.2025 | Inzell (GER) |
| 12. - 14.12.2025 | 2025/26 Ranking Up M Series Dec Nagano (JPN) 12. - 14.12.2025 | Nagano (JPN) |
| 13. - 14.12.2025 | O. G. Gontsjarenko Memorial Moscow (RUS) 13. - 14.12.2025 | Moscow (RUS) |
| 13. - 14.12.2025 | Sanok (POL) 13. - 14.12.2025 | Sanok (POL) |
| 13. - 14.12.2025 | Sanok (POL) 13. - 14.12.2025 | Sanok (POL) |
| 13. - 14.12.2025 | 2025 Adirondack Sprint Championships Lake Placid (USA) 13. - 14.12.2025 | Lake Placid (USA) |
| 13. - 14.12.2025 | Edmonton (CAN) 13. - 14.12.2025 | Edmonton (CAN) |
| 13. - 14.12.2025 | Västerås (SWE) 13. - 14.12.2025 | Västerås (SWE) |
| 13. - 14.12.2025 | Enschede (NED) 13. - 14.12.2025 | Enschede (NED) |
| 13. - 14.12.2025 | Collalbo (ITA) 13. - 14.12.2025 | Collalbo (ITA) |
| 13. - 14.12.2025 | 2025 National Sports Festival Athlete Selection Tournament Morioka (JPN) 13. - 14.12.2025 | Morioka (JPN) |
| 13. - 14.12.2025 | 78th Iwate Prefectural Sports Festival Speed Skating Competition Morioka (JPN) 13. - 14.12.2025 | Morioka (JPN) |
| 13. - 14.12.2025 | 2025 Meiji Hokkaido Tokachi Oval Speed Skating Tournament, Round 4 Obihiro (JPN) 13. - 14.12.2025 | Obihiro (JPN) |
| 13. - 14.12.2025 | Innsbruck (AUT) 13. - 14.12.2025 | Innsbruck (AUT) |
| 14.12.2025 | | Zürich (SUI) |
| 14.12.2025 | | Tønsberg (NOR) |
| 14.12.2025 | Mikołajkowe Zawody w Łyżwiarstwie Szybkim o Puchar Prezydenta Miasta Tomaszowa | Tomaszów Mazowiecki (POL) |
| 14.12.2025 | | Budapest (HUN) |
| 15.12.2025 | | Hagaström (SWE) |
| 15.12.2025 | | Hamar (NOR) |
| 15.12.2025 | | Trondheim (NOR) |
| 16.12.2025 | | Helsinki (Helsingfors) (FIN) |
| 16.12.2025 | | Jyväskylä (FIN) |
| 16. - 18.12.2025 | Junior B/C Championships - Northwest Federal District (Stage 1) Vologda (RUS) 16. - 18.12.2025 | Vologda (RUS) |
| 16. - 18.12.2025 | Junior B/C Championships - Volga Federal District (Stage 1) | Gorki (Nishni Nowgorod) (RUS) |
| 16. - 19.12.2025 | Junior B/C Championships - Siberian Federal District (Stage 1) Irkutsk (RUS) 16. - 19.12.2025 | Irkutsk (RUS) |
| 17.12.2025 | | Stavanger (NOR) |
| 17.12.2025 | | Dresden (GER) |
| 17.12.2025 | | Stockholm (SWE) |
| 17.12.2025 | | Oslo (NOR) |
| 17. - 19.12.2025 | Romanian Sprint Championships 2026 Highlight Inzell (GER) 17. - 19.12.2025 | Inzell (GER) |
| 18.12.2025 | | Arendal (NOR) |
| 19. - 21.12.2025 | Internationales Championship Rennen + Romania Cup Highlight Inzell (GER) 19. - 21.12.2025 | Inzell (GER) |
| 19. - 21.12.2025 | | Tscheljabinsk (RUS) |
| 19. - 21.12.2025 | Romanian Allround Championships 2026 Highlight Inzell (GER) 19. - 21.12.2025 | Inzell (GER) |
| 20.12.2025 | | Erfurt (GER) |
| 20.12.2025 | | Chemnitz (GER) |
| 20.12.2025 | Pettit International Time Trial #2 | Milwaukee (USA) |
| 20.12.2025 | | Geithus (NOR) |
| 20.12.2025 | | Trollhättan (SWE) |
| 20.12.2025 | European Youth Country Match Junior | Heerenveen (NED) |
| 20.12.2025 | | Bjugn (NOR) |
| 20.12.2025 | Offene Vereinsmeisterschaft MEV | München (GER) |
| 20.12.2025 | | Geithus (NOR) |
| 20.12.2025 | | Oulu (Uleåborg) (FIN) |
| 20.12.2025 | | Roseville (USA) |
| 20.12.2025 | Dutch Masters Cup Final 2025-2026 | Leeuwarden (NED) |
| 20. - 21.12.2025 | Berlin (GER) 20. - 21.12.2025 | Berlin (GER) |
| 20. - 21.12.2025 | V.N. Starovoitov Memorial Birobidzjan (RUS) 20. - 21.12.2025 | Birobidzjan (RUS) |
| 20. - 21.12.2025 | Ogólnopolskie Zawody Dzieci Warszawa (POL) 20. - 21.12.2025 | Warszawa (POL) |
| 20. - 21.12.2025 | 2025 UOO Winter Challenge | Salt Lake City (USA) |
| 20. - 21.12.2025 | | Kristiansund (NOR) |
| 20. - 21.12.2025 | Bergen (NOR) 20. - 21.12.2025 | Bergen (NOR) |
| 20. - 21.12.2025 | Collalbo (ITA) 20. - 21.12.2025 | Collalbo (ITA) |
| 20. - 23.12.2025 | Russia - Single Distance Championships 2026 Highlight Kolomna (RUS) 20. - 23.12.2025 | Kolomna (RUS) |
| 21.12.2025 | | Falun (SWE) |
| 22.12.2025 | | Seinäjoki (FIN) |
| 23. - 24.12.2025 | Murom (RUS) 23. - 24.12.2025 | Murom (RUS) |
| 24.12.2025 | | Tscheljabinsk (RUS) |
| 25.12.2025 | New Year's Carousel Skoblikova Sportsschool | Tscheljabinsk (RUS) |
| 25. - 26.12.2025 | Moscow (RUS) 25. - 26.12.2025 | Moscow (RUS) |
| 26. - 27.12.2025 | Korea - Allround Championships 2026 Highlight Seoul (KOR) 26. - 27.12.2025 | Seoul (KOR) |
| 26. - 27.12.2025 | Korea - Sprint Championships 2026 Highlight Seoul (KOR) 26. - 27.12.2025 | Seoul (KOR) |
| 26. - 28.12.2025 | Japan - Championships 2026 Highlight Nagano (JPN) 26. - 28.12.2025 | Nagano (JPN) |
| 26. - 30.12.2025 | Staatsloterij Olympisch Kwalificatietoernooi Heerenveen (NED) 26. - 30.12.2025 | Heerenveen (NED) |
| 27.12.2025 | | Milwaukee (USA) |
| 27.12.2025 | | Calgary (CAN) |
| 27.12.2025 | | Sand (NOR) |
| 27.12.2025 | | Salt Lake City (USA) |
| 27.12.2025 | | Collalbo (ITA) |
| 27. - 28.12.2025 | Erfurt Last-2025 Race + Offene Thüringer Meisterschaften Masters Erfurt (GER) 27. - 28.12.2025 | Erfurt (GER) |
| 27. - 28.12.2025 | Nizjny Novgorod City Championships | Gorki (Nishni Nowgorod) (RUS) |
| 27. - 28.12.2025 | Austria - Single Distance Championships 2026 Highlight Innsbruck (AUT) 27. - 28.12.2025 | Innsbruck (AUT) |
| 27. - 28.12.2025 | Innsbruck (AUT) 27. - 28.12.2025 | Innsbruck (AUT) |