Holy day

Holy day refers to a religious commemorative day or festival:


 * Liturgical year, determines when feast days, including celebrations of saints, are to be observed
 * List of movable Eastern Christian observances
 * List of movable Western Christian observances
 * Holy day of obligation, in Catholicism, days on which the faithful are expected to attend Mass
 * Festival (Anglicanism), a type of observance in the Churches of the Anglican Communion
 * List of Hindu festivals
 * Buddhist holidays
 * Islamic holidays
 * Jewish holidays
 * Heathen holidays, in Neopaganism
 * Zoroastrian festivals