CREATE TABLE table_name_93 (date VARCHAR, score VARCHAR, venue VARCHAR)

On what Date in Stade Leopold Senghor, Dakar was the Score 4 0?
SELECT date FROM table_name_93 WHERE score = "4–0" AND venue = "stade leopold senghor, dakar"
SELECT "date" FROM "table_name_93" WHERE "4–0" = "score" AND "stade leopold senghor, dakar" = "venue"