CREATE TABLE table_53967 ("Year" FLOAT, "Date" TEXT, "Drivers" TEXT, "Distance/Duration" TEXT, "Race Title" TEXT)

What day is the grand prix de trois-rivi res?
SELECT "Date" FROM table_53967 WHERE "Race Title" = 'grand prix de trois-rivières'
SELECT "Date" FROM "table_53967" WHERE "Race Title" = 'grand prix de trois-rivières'