Croatia has a rich tradition of celebrating holidays. There was no more important event in the life of an individual or a community that was not marked by some custom. During the holidays, family, neighbors, locals would gather, hang out, sing, dance. As in the past, as now, it was important to include children in the celebration of holidays and customs. Customs are subject to constant changes, therefore traditional elements and characteristics of holidays are mixed with new, more modern elements. In this thesis emphasis is placed on the traditional celebration of holidays such as Easter, All Saints Day, St. Nicholas, St. Lucia, Christmas Day and Christmas, and carnivals and comparison with new, contemporary customs or certain elements of customs such as Halloween, Christmas and Advent customs taken from other nations. In the second part of the diploma thesis, there is a research that will try to determine which are the traditional and which are the modern elements of the celebration of certain holidays and holidays present today, how much the celebration of holidays and holidays differs from the past to today, and whether there are differences in celebrating them in rural and urban area. A well-known folk saying in Slavonia „It is better for a village to die than for an custom“.