The International Classification of Functioning, Disability and Health (ICF), WHO 2001, represents a system to describe the abilities and the restrictions of a person with a health concern. As a part of the WHO classification family, the ICF contributes to an ability-focused approach; based on approximately 1400 codes, it depicts a holistic picture of early health and education processes of children with developmental difficulties. The ICF helps to increase the quality of ECEC-processes within the global strategies of “nurturing care”– bringing together health, nutrition, early learning, parental empathy, and safety. Other systems (ICD 10) focus on individual deficits (in MK still called “defects”) and tend to rely on a medical understanding of disability. Within the UN Convention on Persons with Disability, the ICF is widely recognized in Europe (see the DE “BTHG”, Law on Participation, 2017)” which anticipates the use of the ICF. Also, the Styrian Landesbehindertengesetz (Law on Persons with Disabilities) introduced ICF in 2004 to describe the support need for adult PwD. In North Macedonia, the ICF was officially translated (supported by UNICEF) and launched with the support of the Ministry of Labour and Social Policy in September 2017. Moreover, the Macedonian disability commissions consider using the ICF as categor (izing system. First trainings (UNICEF supported ToT of family doctors in Skopje in June 2017) and joint learning with pediatricians within Erasmus+ ICFCY-MedUse (www.icfcy-meduse.eu) promotes the process of implementation. In Germany, the new law increased the need for professionals to learn about the ICF (www.teilhabe-verbessern.de) reached more than 500 kindergarten teachers and parallel trainings for pediatricians were organised. Yearly Conferences of ICF users in Germany reached approx. 1000 professionals from the field of inclusive kindergartens in Germany.Within the ongoing training processes (ICF-certification of professionals in kindergarten and in social pediatrics) 3 professional groups supporting the first 1000 days in life are unaddressed: 1) (home visiting) patronage nurses in North Macedonia providing health and rearing support to families with newborns, 2) early support systems and family midwifes in Germany, and e) and educational professionals in nurseries (mainly in Austria and Turkey).Even though in North Macedonia patronage nurses have been trained concerning family-oriented home visiting (UNICEF supported), the usage of ICF has not been addressed yet. A comparable lack of training refers to family midwifes or developmental specialists in Turkey.The ICF as a worldwide recognized meta-language provides this necessary common communication base between diverse sectors education (nursery), health, and other involved professionals and it increases the quality of the early support services as all the involved groups within a team (including the parents) use ONE terminology. This participation of all the involved professionals increases the commitment and participation within the support process for children with developmental difficulties.Recent Erasmus+ project ICYCY-MedUSE has already produced training materials which, however, did not focused on the first 1000 days and did not address the needs of early-days professionals and their communication with parents (in terms of quick guide).The goal of “Common language for the first 1000 days” therefore consists in increasing knowledge and skills for multidisciplinary professionals within the first 1000 days by:a) Adapting the existing ICF training materials towards professionals working with very young toddlers and their families. The sensitivity of professionals is increased by multiplication of knowledge.b) Increasing the quality of cooperation processes by introducing a common language and comply with ongoing social-political processes (see MK and DE).Outcomes:O1: Tailor-made ICF training modules in Macedonian, German, and Turkish for patronage nurses, early support services, and professionals in nurseries working with very small children based on existing materials. Specific issues of age, connection between health, education/parenting and social (see WHO concept of “Nurturing care) are addressed in this adaption, mainly focusing on a possible lack of diagnosis during these early stages of development.O2: Quick Guide to ICF for professionals (concerning selected important items) to ensure that all the relevant professionals are familiar with ICF and are able to use it in daily life and to increase understanding between professionals and parents in the support processes for small children with developmental problems.Consortium:Association for Promotion of Education, Culture and Sport “Education for All” (NGO in MK)Association of Nurses, Technicians, and Midwives (Professional Association in MK)Medical School Hamburg (Research Institute in DE)Dr. Pretis (SME in AT)Dr. Dudu Melek Obuncuoglu (SME in TR).