CREATE TABLE table_7806 ("Tie no" TEXT, "Home team" TEXT, "Score" TEXT, "Away team" TEXT, "Date" TEXT)

What is the date of the match with sheffield wednesday as the away team?
SELECT "Date" FROM table_7806 WHERE "Away team" = 'sheffield wednesday'
SELECT "Date" FROM "table_7806" WHERE "Away team" = 'sheffield wednesday'