Question: what are christian holy days?
Answer: Advent Sunday. Advent Sunday is the start of the Christian year and, in the Western churches, is four Sundays before Christmas. ... 
All Saints' Day – 1 November. ... 
Ascension Day. ... 
Christmas Day - 25 December (Western Christians) ... 
Easter Day. ... 
Epiphany - 6 January. ... 
Good Friday. ... 
Lent and Ash Wednesday.