a consecrated day or religious festival, especially one other than Sunday.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use holy day in a sentence
As a behavior-change specialist, Milkman sees January 1st as something of a high holy day.
From the point of view of those not observing the holy day, it should be business as usual here at the Frum blog.
Christmas morning, Nathan Deuel talked to refugees cautiously observing the holy day.
That was the second holy day-time of poor Caleb—the love-romance of his life: it soon closed.Night and Morning, Complete | Edward Bulwer-Lytton
You may go to rest secure that no blood will be spilled to-night; and to-morrow, you know, is a holy-day.The Hour and the Man | Harriet Martineau
The Monday morning papers tell p. 447a fearful tale of crimes committed on the holy day.Lights and Shadows of New York Life | James D. McCabe
As the island was approached, the Admiral named it, in remembrance of the holy day, Dominica.
The holy day closed with the setting sun, and then his hosts were able to show him the special attention which they desired.The Life of Jesus of Nazareth | Rush Rhees
British Dictionary definitions for holy day
a day on which a religious festival is observed
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012