This might help:To whom it may concern,
would you please be so kind as to try to help me out with the following: I was wondering if there is a term in English that would describe the religious holiday of a city that is commonly known as `patron saint`s day`, but in a case where the day is not celebrated to praise the patron saint in question, but a certain religious “act”, like the Ascension for example?
So, for example, if a country celebrates St.George, I can say that the country`s Patron Saint Day is St. George.
No, you can say the day is St. George's Day.
But what if it celebrates the Ascension for the same purpose? How to use `patron saint` for Ascension?
You can't, given that the Ascension was an event, not a saint.
What term could be used for the day celebrating a religious act (except for Ascension Day in this particular case)?
It's a religious holiday (derived from Holy Day), or a religious feast (Feast of the Ascension).
You could ask "What religious holidays does your country observe?"
Thank you very much in advance!
St George's Day - Wikipedia, the free encyclopedia
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