CREATE TABLE table_31539 ("Year" FLOAT, "Competition" CLOB, "Date" CLOB, "Location" CLOB, "Score" CLOB, "Result" CLOB)

what is the date in 1986?
SELECT "Date" FROM table_31539 WHERE "Year" = '1986'
SELECT "Date" FROM "table_31539" WHERE "Year" = '1986'