Not everyone has the privilege for special, religious days as recognized national holidays. With a multifaith calendar all religious holidays of different groups are easy to recognize and to make visible. They should be considered for instance in holiday planning or when deciding deadlines for major projects or assignments.
Calendarlabs.com allows you to search by religious holidays, country holidays or national day holidays which may be useful if your group includes students from around the world and from diverse backgrounds. Visit the calendar at https://www.calendarlabs.com/holidays/religious/