CREATE TABLE table_34997 ("Date" TEXT, "Visitor" TEXT, "Score" TEXT, "Home" TEXT, "Decision" TEXT, "Attendance" TEXT, "Record" TEXT)

What date has ny islanders as the visitor?
SELECT "Date" FROM table_34997 WHERE "Visitor" = 'ny islanders'
SELECT "Date" FROM "table_34997" WHERE "Visitor" = 'ny islanders'