Canon 3300 Series Manual page 191

To specify the starting time to automatically switch to the memory receive
function (Memory Lock Start Time):
Press "Memory Lock Start Time," and select "Everyday," "Select Days," or "Off."
When "Everyday" is selected, press "Next," and press numbers "1"-"5." Enter the start time
using - (numeric keys), and press "OK."
6
You can set up to five starting times for the Memory Lock function.
Enter the time in 24-hour clock format, as four digits without a space.
(Example: 7:05 a.m. → 0705; 11:18 p.m. → 2318)
If you make an incorrect entry, press (Clear), and enter the correct four-digit number.
Setting Fax Management 6-15