It's polite to abide by others' schedules.
Jennifer is opening a new joint bank account with her husband, and they need to go to the branch during weekday business hours.
Jennifer wants to schedule an appointment for their bank meeting.
Jennifer asks her husband when his lunch break is and then schedules the meeting for that time.
Jennifer schedules the appointment for the time that suits her best without consulting with her husband first.
Jennifer's husband makes it to the bank and then back to work in time.
Jennifer's husband ends up missing an important meeting at work in order to make the appointment at the bank.