From what I know the time does matter. In the first part of the night the body release some hormones that make sleep more effective. It's not only about the num

From what I know the time does matter. In the first part of the night the body release some hormones that make sleep more effective. It's not only about the number of hours. Also, look up sleep debt. It's exactly what the words suggest. Until you "pay" that debt, you tend to sleep later, because the body wants to catch up on that debt.