Lammas Day

Today, the first of August, is indeed Lammas Day.

Lammas Day (Anglo-Saxon hlaf-mas, "loaf-mass"), is a holiday celebrated in some English-speaking countries in the Northern Hemisphere, usually between 1 August and 1 September. It is a festival to mark the annual 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, which falls at the halfway point between the summer Solstice and Autumn September Equinox.

So sayeth Wikipedia here, along with much else.

Even though today is actually Lammas Day, the Ould Lammas Fair actually occurs at the end of August.  Go figure.