Blǽd-dæg

According to the Old English Dictionary:

blǽd-dæg

g. -dæges; pl. nom. -dagas; g. pl. -daga; m. A prosperousor happy day; prosperitatis dies, faustus dies :-- Ðǽr we mótun brúcan blǽddaga where we may enjoy prosperous days, Exon. 65 b; Th. 242, 16; Ph. 674: Cd. 60; Th. 73, 7; Gen. 1201. blæd-dæg