Canon imageRUNNER 3530 Reference Manual page 227

Enter the time in 24-hour notation as four digits (including zeros) without a space.
➞ 0705
Examples: 7:05 a.m.
11:18 p.m. ➞ 2318
If you make a mistake when entering the time, select the day of the week again ➞
enter another four digit number.
You can also press (Clear) to clear the incorrect values.
The selected mode is set.
3
Press [Done] repeatedly until the Basic Features screen
appears.
4
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Timer Settings