Heáhmæsse-dæg
Bosworth & Toller Anglo-Saxon Old English Dictionary - heáhmæsse-dæg
According to the Old English Dictionary:
es;
- heáhmæsse-dæg
- m. A day on which high mass is celebrated :-- An heáhmæssedagum, ꝥ is Sancte Stephanes and Sancte Ióhannes . . ., Nap. 36. heahmæsse-dæg