I got an email interview confirmation without a date schedule, do i call or go to talk to the manager?

If you see the manager frequently, asking him/her what is the date and time for the interview should be fine. However, you do not want to interrupt your manager for such a simple question since you are taking up the time of two people (your and the manager's). The most time efficient way to handle this is to simply respond to the email with an opening kiss-*** line like "I look forward to having the opportunity to meet with you" and then mention next that his email did not specify the day or time for the meeting etc. Time management is very important and the way you handle the email will show your efficiency. Best of luck!