CREATE TABLE table_66686 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Attendance" TEXT)

What was the earliest week on September 26, 1965?
SELECT MIN("Week") FROM table_66686 WHERE "Date" = 'september 26, 1965'
SELECT MIN("Week") FROM "table_66686" WHERE "Date" = 'september 26, 1965'