ember days, n.pl. any of the days traditionally reserved for fasting and prayer in the Christian Church, now associated with ordinations.

Etymology:
OE ymbren (n.), perh. f. ymbryne period f. ymb about + ryne course

365 days, 366 days, canicular days, days, dog days, early days, ember, ember day, good old days, old days, one of these days, salad days