What is the date of the that was played with the Baltimore Colts at home?
CREATE TABLE "playoff_games_that_went_at_least_into_do" (
  "length_of_game" text,
  "date" text,
  "away_team" text,
  "score" text,
  "home_team" text
);
SELECT "date" FROM "playoff_games_that_went_at_least_into_do" WHERE "home_team"='baltimore colts';