There have been many times when I might have been up at 2am but for awhile now, it's been more rare and I sleep in until 3:30 or 4am

I go to bed at 8pm so am getting a wonderful solid 7 or 8 hours of good rest.
Going to sleep has never been a problem unless I drink something caffeinated past noon, it's always been waking up too early and not being able to go back to sleep.
Magnesium made a huge difference in my sleep habits.
I think I remember you saying it didn't work for you?
"We're all just walking each other home." -Ram Dass
"Be a lamp, or a lifeboat, or a ladder."-Rumi
"It's all one song!" -Neil Young