CREATE TABLE table_10209 ("Season" FLOAT, "Grand FinalDate" TEXT, "WinningTeam" TEXT, "Score" TEXT, "LosingTeam" TEXT, "Location" TEXT, "GF Attendance" FLOAT, "Clive Churchill Medal" TEXT)

I want the Grand Final Date for season 1988
SELECT "Grand FinalDate" FROM table_10209 WHERE "Season" = '1988'
SELECT "Grand FinalDate" FROM "table_10209" WHERE "Season" = '1988'