Most Staples store hours are: Monday to Friday, 9-9pm Saturday, 10-5pm Sunday. 11-5pm. (I can't believe I actually looked this up!)
In Toronto from Monday-Friday it closes at 9. Saturday; 6, but some stores close at 5. Sunday; some stores close at 5 and others at 6.
9
It's different depending on where you live.
9PM most weekdays
12pm
9pm
12pm
Most staples are closing to the public no later than 1700 hours - 5pm
9;30
3:00pm
12:00