When are start dates (1st night) for the season of 1966?
CREATE TABLE "table1_159359_2" (
  "no" text,
  "season" text,
  "start_date_1st_night" text,
  "end_date_last_night" text,
  "location" text,
  "no_of_proms" text
);
SELECT "start_date_1st_night" FROM "table1_159359_2" WHERE "season"='1966';