People who respect your time usually respect more than your schedule.

How someone treats your time reveals how they weigh you generally. Arriving when they said, not extending things you agreed would be short, giving notice when plans change, all of it comes from the same place as taking your preferences and limits seriously. Time is just the most visible form of it. The pattern rarely stops at the calendar.

Watch this early with new people, since it shows up before anything else does. And check your own habits with other people’s hours. Punctuality is a small thing that communicates something quite large.