5:00 pm PT might be unsuitable for EST time zone
When planning a call between Pacific Time and Eastern Standard Time, you need to consider time difference between these time zones. PT is 2 hours behind of EST.
It is 5:00 pm in PT. This does not fall within the span of usual working time between 11:00 am and 6:00 pm in EST, but it still might be suitable to arrange a meeting, since it would be 7:00 pm in EST, which is between 7:00 am and 11:00 pm EST time.