Your commute time is a big factor plus your natural circadian rhythm. I live barely 5 minutes from my job, so I wake up at 6am/6:10am at the latest. I try to go to bed before 12am, but 4hrs is enough for me to not be tired, so I’ll often wake up before 6am

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9ish go to sleep, 5:30 wake up

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I have work at 6:45 and live ≈22 minutes away. I prepare (shower/etc) the night before and go to sleep (in theory) at 9:00. However, I found that if I take an hour-ish-long nap at about 4:00 it helps a lot with waking up earlier. I usually wake up at 6:00 but today I woke up at 5:15 due to the nap.

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