Cilda mæsse-dæg

According to the Old English Dictionary:

es;

cilda mæsse-dæg

m. Childermas [Innocents'] -day; festum innocentium :-- Ðys Gódspel sceal on cilda [MS. cylda] mæsse-dæg this Gospel must be on Childermas [Innocents']-day, Dec. 28th, Rubc. Mt. Bos. 2, 13-18; Notes, p. 574. cilda mæsse-dæg