CREATE TABLE "april" (
  "date" text,
  "visitor" text,
  "score" text,
  "home" text,
  "leading_scorer" text,
  "record" text
);

Question: What day was the game that had the Cavaliers as visiting team and the Knicks as the home team?
SQL: SELECT "date" FROM "april" WHERE "visitor"='cavaliers' AND "home"='knicks';