Wiktionary
n. A day in a liturgical calendar that is observed in honour of a saint; not necessarily a holiday.
WordNet
n. a day commemorating a saint
Usage examples of "saint's day".
It was an oddly auspicious day for the count and his forces to arrive back home: At the morning service the deacon had reminded them all that this was the saint's day of St.
The prejudices of the villagers had prevented her from attending church on the saint's day, but she had cared enough to come to the plaza to pay her devotions.
She had icons, and she had richly framed sepia photographs of princesses she had loved, and bishops she had served, and on her saint's day - or was it her birthday or the bishop's?
Dirty shoes and a crumpled tie at the Saint's Day service the other day had earned him a session of detention.
So on the morrow, being a saint's day, he sent a neighbour's lad to Monna Belcolore with a request that she would be so good as to lend him her stone mortar, for that Binguccio dal Poggio and Nuto Buglietti were to breakfast with him that morning, and he therefore wished to make a sauce.