Even though the issue of the Calendar used by the Serbian Orthodox Church has been discussed for more than one century, it is still equally as current as in the time of the first attempts aimed at its reform. In the discussions on this topic, the Church Calendar is frequently connected to the religious, i.e. national identity and traditions. This paper is aimed at exploring whether and how citizens of Serbia consider this issue and which arguments are employed by the most fervent supporters of the Calendar, or the opponents of its reform. It aims at providing answers to a range of issues, among which the impact of knowledge and level of information relating to positions about this topic has the central position.