Changing dates of visa interview in Canada

[h1bstamping_canada]

on site they say "The applicant may change the appointment date as many times as needed before the reschedule/cancel deadline in the confirmation email."

 

My question is if I schedule my visa interview  on 14th oct, how much time I get to make any changes? 

[h1bstamping_canada]

I just found out. We can change or cancel before one day. 

[sthamago]

on site they say "The applicant may change the appointment date as many times as needed before the reschedule/cancel deadline in the confirmation email."

 

My question is if I schedule my visa interview  on 14th oct, how much time I get to make any changes? 

24 hours before the actual interview date.