By Sarah Kingsbury
In most western countries, the Calendar app on the iPhone or iPad has Sunday set as the first day of the week. But considering the work week tends to divide quite distinctly into weekdays and the weekend, with most of our appointments and business meetings taking place Monday through Friday, you may prefer to set Monday as the first day of the week. Or if you have an unusual schedule, you could set any day of the week you prefer to be the first day of your personalized week. Here's how to change what day your week starts in the Calendar app on iPhone.