| 01.05 | |  GP Vorarlberg b/by Radhaus Rankweil | 1.2 | |
| 01.05 | |  Omloop van het Waasland | 1.2 | |
| 01.05 | |  Eschborn-Frankfurt | 1.UWT | |
| 01.05 | 05.05 |  Vuelta BANTRAB | 2.2 | |
| 03.05 | |  National Road Championships - Egypt TT | CN | Cancelled |
| 03.05 | 05.05 |  Grande Prêmio Internacional Beiras e Serra da Estrela | 2.2 | |
| 04.05 | |  Grand Prix du Morbihan | 1.Pro | |
| 04.05 | |  Sundvolden GP | 1.2 | |
| 04.05 | 26.05 |  Giro d'Italia | 2.UWT | |
| 04.05 | | National Road Championships - Egypt | CN | |
| 04.05 | |  Ronde van Overijssel | 1.2 | |
| 05.05 | | Elfstedenronde Brugge | 1.1 | |
| 05.05 | | Tro-Bro Léon | 1.Pro | |
| 05.05 | | Circuito del Porto - Trofeo Arvedi | 1.2 | |
| 05.05 | | Ringerike GP | 1.2 | |
| 05.05 | |  National Road Championships - United Arab Emirates TT | CN | |
| 08.05 | 12.05 |  Flèche du Sud | 2.2 | |
| 08.05 | 12.05 |  Tour de Hongrie | 2.Pro | |
| 09.05 | 12.05 |  Vuelta a Catamarca Internacional | 2.2 | Cancelled |
| 09.05 | | Circuit de Wallonie | 1.1 | |
| 10.05 | 12.05 |  Tour de Kumano | 2.2 | |
| 11.05 | |  Jelajah Cycling Series Surakarta | 1.2 | Cancelled |
| 11.05 | | Tour du Finistère | 1.1 | |
| 11.05 | |  Grand Prix de la Ville d'Oran | 1.2 | |
| 11.05 | |  Silesian Classic | 1.2 | |
| 11.05 | 12.05 |  Tour of Kirikkale | 2.2 | Cancelled |
| 12.05 | | Flèche Ardennaise | 1.2 | |
| 12.05 | 21.05 | Tour d'Algérie International de Cyclisme | 2.2 | |
| 12.05 | | Boucles de l'Aulne - Châteaulin | 1.1 | |
| 14.05 | 19.05 | 4 Jours de Dunkerque | 2.Pro | |
| 15.05 | |  National Road Championships - USA TT | CN | |
| 15.05 | 19.05 |  International Tour of Hellas | 2.1 | |
| 16.05 | 19.05 | Vuelta a Santiago del Estero | 2.2 | Cancelled |
| 16.05 | 19.05 | Tour of Sakarya | 2.2 | |
| 18.05 | | Veenendaal-Veenendaal | 1.1 | |
| 19.05 | |  GP Gorenjska | 1.2 | |
| 19.05 | 26.05 | Tour of Japan | 2.2 | |
| 19.05 | | National Road Championships - USA | CN | |
| 19.05 | | International Criterium in Sakai | CRTP | |
| 19.05 | | Antwerp Port Epic / Sels Trophy | 1.1 | |
| 19.05 | | Gran Premio New York City | 1.2 | |
| 20.05 | 24.05 |  Cycling Tour of Albania | 2.2 | |
| 20.05 | | Ronde van Limburg | 1.1 | |
| 20.05 | | Paris - Troyes | 1.2 | |
| 21.05 | 26.05 |  Tour du Mali | 2.2 | |
| 21.05 | |  Road Continental Pan-Am Championships TT | CC | |
| 22.05 | | Grand Prix de la Ville d'Annaba | 1.2 | |
| 22.05 | 26.05 | Alpes Isère Tour | 2.2 | |
| 23.05 | 25.05 |  Tour of Estonia | 2.1 | |
| 23.05 | 26.05 | Tour of Norway | 2.Pro | |
| 23.05 | 26.05 | Tour de la Mirabelle | 2.2 | |
| 23.05 | 26.05 | Boucles de la Mayenne - Crédit Mutuel | 2.Pro | |
| 24.05 | | Grand Prix de la Ville d'Alger | 1.2 | |
| 24.05 | 27.05 | Walmart Joe Martin Stage Race | 2.2 | Cancelled |
| 25.05 | |  Grand Prix Herning | 1.2 | |
| 25.05 | | Due Giorni Marchigiana - G.P. Santa Rita | 1.2 | |
| 25.05 | | Van Merksteijn Fences Classic | 1.1 | Cancelled |
| 26.05 | | Simac Omloop der Kempen | 1.2 | |
| 26.05 | | Due Giorni Marchigiana - Trofeo Città di Castelfidardo | 1.2 | |
| 26.05 | | Fyn Rundt - Tour of Funen | 1.2 | |
| 26.05 | | Road Continental Pan-Am Championships | CC | |
| 26.05 | | Rund um Köln | 1.1 | |
| 27.05 | 29.05 |  Tour of Bostonliq | 2.2 | |
| 27.05 | | Cycling Stars Criterium - Pieve di Soligo | CRTP | Cancelled |
| 28.05 | | We Like Bike Criterium - San Daniele Del Friuli | CRTP | Cancelled |
| 29.05 | | Circuit Franco-Belge | 1.Pro | |
| 29.05 | | Cycling Stars Criterium - Cittadella | CRTP | Cancelled |
| 29.05 | | Mercan'Tour Classic Alpes-Maritimes | 1.1 | |
| 30.05 | 02.06 | Ronde de l'Oise | 2.2 | |
| 30.05 | 02.06 | Tour of Malopolska | 2.2 | |
| 31.05 | 09.06 |  Tour du Maroc | 2.2 | |
| 31.05 | 09.06 |  Tour du Cameroun | 2.2 | |
