CREATE TABLE table_name_26 (date VARCHAR2, decision VARCHAR2, record VARCHAR2)

What was the date of the game with a decision of Niittymaki and when the Flyers had a record of 30 21 5?
SELECT date FROM table_name_26 WHERE decision = "niittymaki" AND record = "30–21–5"
SELECT "date" FROM "table_name_26" WHERE "30–21–5" = "record" AND "decision" = "niittymaki"