Like Beltane/Calan Mai, it was viewed as a liminal time, when the limit between this world and the Otherworld diminished. Vikings Odin 3d. This implied the Aos Sí (Connacht elocution/iːsˈʃiː/eess-SHEE, Munster/e:s ʃi:/), the ‘spirits’ or ‘pixies’, could all the more effectively come into this world and were especially dynamic.
Most researchers see the Aos Sí as “corrupted adaptations of antiquated divine beings […] whose power stayed dynamic in the individuals’ brains even after they had been authoritatively supplanted by later religious convictions”. Vikings Odin 3d. The Aos Sí were both regarded and dreaded, with people regularly summoning the assurance of God when moving toward their abodes.