The phenomenon of weekly sacred day in Judaism, Christianity and Islam

In Judaism, Christianity and Islam, which are among the major world religions, there are three separate weekly prayer days that are considered sacred. These are Friday in Islam, Saturday in Judaism and Sunday in Christianity. Jews, Christians and Muslims reveal the sacredness of these days by performing various specific rituals and prayers and by imposing certain prohibitions to these days. The main subject of this study is the emergence, in other words, the origin, of these sacred days. If it is need to be expressed more clearly, the study searches for an answer to some questions about these days that belong to different religious and that are attributed sanctity to each of them: what their backgrounds are, how and why they are turned out and why they are choosen. This study begins with the historical background's presupposition of the emergence of Friday, Saturday and Sunday, which are considered the weekly holy gathering days of Islam, Judaism and Christianity respectively. The basic hypothesis of the study is to assume that there are historical events and external influences as well as religious background in the fact that these days are considered sacred and specially selected days. In the study, descriptive, hermeneutic and phenomenological methods , which are among the research methods of the History of Religions, have been used . As resources, in addition to the holy books of Christianity, Islam and Judaism, written and printed works written on the subject and electronic resources and internet resources were used. Keywords: Judaism, Christianity , Islam, Holy Day, Friday, Saturday, Sunday