When you were in college, what time do you go to sleep? What are you usually doing that makes you stay up that late?

life as a college student is great! Except for the sleep part! (at least before the pandemc) My friends have always told me that I don't get enough sleep, and I usually sleep at around 3 after studying and chatting with friends, and wake up at 7:30-ish for morning classes
When you were in college, what time do you go to sleep? What are you usually doing that makes you stay up that late?
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