Background. According to the reports of World Health Organization (WHO), every year over 5 millionpeople died because of violence, accidents and injury, and 600 million disabled. In 2020, 8.4 milliondeath is expected due to exposures of accidents and injury.By the end of 2013, population of Mongolia is 2.930.3 million and has increased by 2.2 percent,comparing to the year before. 68.1% of the total population is living in the urban, and the remaining31.9% is living in the rural. The 46.8% of the total population is residing and living in the capital cityUlaanbaatar, which counts at 1.372.1. million. 80% of residents (residential community) of Ulaanbaatarcity is receiving inpatient care, and 90% is receiving emergency care due to accidents and injury at theNational Traumatology and Orthopedic Research Center (NTORC).A number of clients received emergency care due to accidents and injury at the NTORC is continuallyincreasing for last 5 years. The number of inpatients in 2012 is reduced comparing to a year before.But in 2013, it has increased by 10.9% than in 2012. Also the increase by 10.0% is observed in the last5 year’s average. A major percentage of clients who received care traumatized when used alcoholicbeverages. This exposure is increasing during the holidays. Therefore it demands to find out reasonsof accidents and injury during the holiday celebrations.Goal. To define reasons of accidents and injury for clients who received care during the holiday at theNTORC.Methods. A descriptive case study is conducted based on client’s information which received emergencycare at the NTORC during 5 major holidays in 2012-2014. Selected five holiday celebrations were TheNew Year, Lunar New Year, International Woman’s Day, National Day for Armed Forces and Military(as known Men’s Holiday) and the Naadam (The Summer Festival). A selection of holidays consistedfrom series of days as of pre, post and during holidays when the celebration is for only one-day. Whenthe holiday celebration is for 3 days, all 3 days were chosen. The study described causes of trauma,diagnosis, age, gender and the residential of clients who received the emergency care due accidentsand injury.Results. A number of clients received emergency care during the major holidays, except the LunarNew Year is higher than non-holiday days. Number of clients received emergency care which usedalcoholic beverage is also more during the holidays. Over 60% of exposed is males and majority aged25-34. Causes of injuries during the holiday celebrations were all kinds of falls, interpersonal (domestic)violence’s, and traffic accidents. More exposures of interpersonal (domestic) violence’s during the wellknown Men’s Day holiday has been registered as well as more traffic accidents during the Naadam (TheSummer Festival).