1 a day on which the people of a community enjoy themselves by entering into various games, races, dancing, etc.; a sports day.
1953  The annual Union Labour Day Picnic, held the first Monday in August each year, has become the "big day" not only for miners and their families but for all the children of Yellowknife who are provided with free treats and a first-class field-day, as guests of the Union.
1960  In those times a big field day was held in July or August in Shaunavon.
2 a day on which livestock are shown and judged and where breeding programs are discussed.
1953  Prior to the provincial mink show, a number of field days are held both in the northern and southern part of the province.
1958  The field day was staged at Lacombe experimental farm where swine herds, Yorkshire, Lacombe and crossbreds were inspected.