This Feast is one of the very oldest of Holy Days, having always been associated with the observance of Christmas.
A good Church Almanac will give the needed information concerning the "Occurrence of Holy Days" which takes place during the year.
With reference to your question in connection with the observance of Baha’i Holy Days; the Baha’i day begins and ends at sunset.
Bahá’í Holy Days recognized by Educational Department of the State of Victoria, Australia.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "holy days" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.