What is another word for solemn fast day?
Pronunciation: [sˈɒləm fˈast dˈe͡ɪ] (IPA) 
A solemn fast day is a day of reflection and contemplation. It is a day of deep spiritual significance, and is observed by a number of different religions and cultures around the world. There are many different synonyms that can be used to describe a solemn fast day, including holy day, day of prayer, day of atonement, day of sacrifice, and day of fasting. These synonyms all carry powerful connotations of devotion, self-discipline, and spiritual discipline, and are often associated with deep religious or cultural traditions. Whether observed individually or as part of a larger community, a solemn fast day is a time for introspection, contemplation, and spiritual growth.
