Thanks for the details I applied walk in on 26 sep at Vancouver bls and got my acknowledgment on 28 sep just waiting to get the status to be changed and fingers crossed because I have my tickets booked for Nov 26 and I am hoping that I will be fine by then right.In Toronto I have seen most between 11 am to 12:30 pm EST and few late afternoon (will show with next day's date in IST). I do not think there is a precise time though -- hopefully they work whole day (Ottawa excepted.. lol..)
Those who do not want to check every 5 minutes, try 1pm EST and 6pm EST to give some time for data to sync (or only 6pm EST if just once per day) on local working days.