CREATE TABLE table_19636 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Record" TEXT, "Game Site" TEXT, "Attendance" FLOAT)

What was the date when the attendance was 63995
SELECT "Date" FROM table_19636 WHERE "Attendance" = '63995'
SELECT "Date" FROM "table_19636" WHERE "Attendance" = '63995'