CREATE TABLE table_21612 ("Game" FLOAT, "Date" TEXT, "Team" TEXT, "Score" TEXT, "High points" TEXT, "High rebounds" TEXT, "High assists" TEXT, "Location Attendance" TEXT, "Record" TEXT)

Chauncey Billups (6) had a high assist on what date?
SELECT "Date" FROM table_21612 WHERE "High assists" = 'Chauncey Billups (6)'
SELECT "Date" FROM "table_21612" WHERE "High assists" = 'Chauncey Billups (6)'