How to cure a chronic night owl?

I'm a 'wide awake at 1 and 2 in the morning' kinda person. Even when I am having to get up at 5 a. m. for work some days, I still go to bed really late. It's not that I don't like sleeping. I just love being up alone at night and I'm wide awake. It's not good for me though.
How to cure a chronic night owl?
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