In some English-speaking countries in the Northern Hemisphere, August 1 is Lammas Day (Anglo-Saxon hlaf-mas, “loaf-mass”), the festival of the wheat harvest, and is the first harvest festival of the year. On this day it was customary to bring to church a loaf made from the new crop, which began to be harvested at Lammastide.
The loaf was blessed, and in Anglo-Saxon England it might be employed afterwards to work magic: a book of Anglo-Saxon charms directed that the lammas bread be broken into four bits, which were to be placed at the four corners of the barn, to protect the garnered grain.
In many parts of England, tenants were bound to present freshly harvested wheat to their landlords on or before the first day of August. In the Anglo-Saxon Chronicle, where it is referred to regularly, it is called “the feast of first fruits”. The blessing of first fruits was performed annually in both the Eastern and Western Churches on the first or the sixth of August (the latter being the feast of the Transfiguration of Christ).
Lammas has coincided with the feast of St. Peter in Chains, commemorating St. Peter’s miraculous deliverance from prison, but in the liturgical reform of 1969, the feast of St.Alphonsus Liguori was transferred to this day, the day of St. Alphonsus’ death.
Source: Wikipedia https://en.wikipedia.org/wiki/Lammas