| 3–4 May 2027 | 6th International Conference on Cancer Sciences and Therapy | Bangkok, Thailand |
| 3–4 May 2027 | The International Symposium on Microbiology and Microbial Biotechnology (ISMMB 2027) | Kuala Lumpur, Malaysia |
| 6–7 May 2027 | 5th International Webinar on Global Healthcare and Medicine | Khet Huai Khwang, Thailand |
| 6–7 May 2027 | Global Forum on Pollution Control & Sustainable Environment | London, United Kingdom |
| 7–9 May 2027 | 10th International Conference on Electrical Engineering and Green Energy (CEEGE 2027) | Suzhou, China |
| 10–11 May 2027 | 3rd International Conference on Gynecology, Obstetrics and Infertility | Bangkok, Thailand, Thailand |
| 10–12 May 2027 | INTERNATIONAL CONFERENCE ON Neurology and Neuroscience | Budapest, Hungary |
| 10–12 May 2027 | INTERNATIONAL CONFERENCE ON Traditional, Herbal and Integrative Medicine | Budapest, Hungary |
| 11–13 May 2027 | EACR Defence is the Best Attack: Immuno-Oncology Breakthroughs | Barcelona, Spain |
| 12–13 May 2027 | 2027 Imagining Sustainable Worlds Online Symposium, 12–13 May 2027 | Online |
| 12–14 May 2027 | ROME 5th World Conference on Studies on Education, Teaching & Technology (SETT-27) scheduled on May 12-14, 2027 Rome (Italy) | Rome, Italy |
| 12–14 May 2027 | ROME 5th World Congress on Robotics, Manufacturing & Automobile Engineering (R2MAE-27) scheduled on May 12-14, 2027 Rome (Italy) | Rome, Italy |
| 12–14 May 2027 | ROME 6th International Conference on Electrical, Electronics & Biomedical Engineering (REEBE-27) scheduled on May 12-14, 2027 Rome (Italy) | Rome, Italy |
| 12–14 May 2027 | ROME 7th International Conference on Genetics, Cellular & Molecular Biology (RGCMB-27) | Rome, Italy |
| 14–17 May 2027 | 10th International Conference on Electronics Technology (ICET 2027) | Chengdu, China |
| 14–16 May 2027 | 11th World Conference on Research in Social Sciences | Rome, Italy |
| 14–16 May 2027 | 12th International Conference on Research in Education, Teaching and Learning | Rome, Italy |
| 14–16 May 2027 | 17th International Conference on New Ideas in Management, Economics and Accounting | Rome, Italy |
| 14–16 May 2027 | 4th International Conference on Art Studies | Rome, Italy |
| 14–17 May 2027 | 5th International Conference on Power Science and Technology (ICPST 2027) | Zhengzhou, China |
| 17–18 May 2027 | 2nd Euro-Global Women’s Forum 2027 | Berlin, Germany |
| 17–19 May 2027 | Global Congress on Public Health and Epidemiology | London, United Kingdom |
| 17–18 May 2027 | Nursing2027 | 3rd International Summit on Nursing, Midwifery & Healthcare Innovation | Florence, Italy |
| 21–23 May 2027 | 12th International Conference on Machine Learning Technologies (ICMLT 2027) | Stockholm, Sweden |
| 21–23 May 2027 | 3rd International Conference on Mechanical, Electronic and Robotics Engineering (MERE 2027) | Wuhan, China |
| 21–23 May 2027 | 8th Information Communication Technologies Conference (ICTC 2027) | Nanjing, China |
| 24–26 May 2027 | 3rd Annual Global Summit on Renewable and Sustainable Energy | brussels, Belgium |
| 24–26 May 2027 | 3rd International Connect on Clean & Traditional Energy | Amsterdam, Netherlands |
| 24–25 May 2027 | 4th International Conference on Machine Learning, Artificial Intelligence & Data Science | Berlin, Germany |
| 24–25 May 2027 | 4th International Conference on Robotics, Automation & Intelligent Systems | Online |
| 24–25 May 2027 | Global Summit on Surgery and Advanced Clinical Practice | Paris, France |
| 24–25 May 2027 | International Conference on Graphene and Advanced Nanomaterials | Barcelona, Spain |
| 24–25 May 2027 | International Conference on Renewable, Non-Renewable & Sustainable Energy Systems | Berlin, Germany |
| 25–28 May 2027 | 12th International Conference on Sustainable and Renewable Energy Engineering (ICSREE 2027) | Madrid, Spain |
| 26–27 May 2027 | 3rd International Conference on Gravitation, Astrophysics and Cosmology | Berlin, Germany |
| 26–27 May 2027 | Global Summit on Advanced Materials and Nanotechnology | Paris , France, France |
| 27–29 May 2027 | 2nd International Conference on Toxicology and Applied Pharmacology | Prague, Czechia |
| 27–28 May 2027 | Global Congress on Gastroenterology & Digestive Diseases 2027 | Singapore, Singapore |
| 27–28 May 2027 | Global Summit on Food Innovation, Safety & Processing 2027 | Singapore, Singapore |
| 27–28 May 2027 | Global Summit on Obesity, Diabetes & Weight Management 2027 | Singapore, Singapore |
| 27–28 May 2027 | World Summit on Physical Medicine & Rehabilitation 2027 | Singapore, Singapore |
| 28–30 May 2027 | 10th International Conference on Artificial Intelligence and Big Data (ICAIBD 2027) | Chengdu, China |
| 28–30 May 2027 | 2027 11th International Conference on Medical and Health Informatics (ICMHI 2027) | Kyoto, Japan |
| 29–31 May 2027 | 17th International Conference on Environmental Engineering and Applications (ICEEA 2027) | Nice, France |