This can also be tough to do if you live in a very northerly or southerly latitude. For example, I live in Alaska and it did not get dark last night until appr

This can also be tough to do if you live in a very northerly or southerly latitude. For example, I live in Alaska and it did not get dark last night until approximately 1 AM, local time. I've adapted myself to sleeping when the clock says I should and not based on how well lit it is.