Public schools allow religious education, in cooperation with religious communities that have agreements with the government, but attendance is not mandatory. The classes are organized widely in public elementary and secondary schools. In 2009, 92% of elementary school pupils and 87% of secondary school students attended the religious education classes. Public holidays in Croatia also include the religious festivals of Epiphany, Easter Monday, Corpus Christi Day, Assumption Day, All Saints' Day, Christmas, and St. Stephen's or Boxing Day. The religious festival public holidays are based on the Catholic liturgical year, but citizens of the Republic of Croatia who celebrate different religious holidays have the right not to work on those dates. This includes Christians who celebrate Christmas on 7 January per the Julian calendar, Muslims on the days of Ramadan Bayram and Kurban Bayram, and Jews on the days of Rosh Hashanah and Yom Kippur. Marriages performed by the religious communities having agreements with the state are officially recognized, eliminating the need to register the marriages in a registrar office.